Excellent! Went through 300 rounds yesterday and not a single problem. I figured I saved over $100 in ammo (5.56) in just one range visit. Broke the unit down when I returned and I did not find much fouling. 40-grain copper plated Winchesters were used in this test. I was very pleased with the group at 100 yards.

Dont buy a JAC conversion kit. It will break within a couple thousand rounds or sooner. His claim of 100% customer satisfaction is total BS. He refuses to even answer his phone. The kits are not guaranteed, but he will "fix them" if you send the broken kit and a check. You'll never see either one again. the guys a crook and his products are garbage

This conversion kit is awesome. I fired 400 rounds through it and had no problems. The 10 round magazine that comes with the bolt kept jamming my gun so I don't use it. Buy a black dog magazine and everything works fine.

This worked perfectly on a Bushmaster CMP (Civilian Marksmanship Program) AR15 rifle. I made sure to oil the chamber were this is installed, due to general reviewer comments on these conversion kits, though the instructions did not mention this as necessary. I shot about 35 rounds, remington copper covered hollow point. They all chambered, fired, and the brass extracted. No hangups or jams. Firearms enthusiasts that I associate with claimed that these conversions kits did not work well, and that I would have been better off buying a full .22 AR15 upper. The problem with buying a full upper, in addition to the $400 and up cost, was that the CMP rifle is set to be competition grade heavy. To put a smaller lighter upper on this would cause the rifle to have a different weight and feel. This conversion kit was a good choice to shoot .22 rounds and still have it be the 'same' rifle. The only negatives with this were that: 1. The instructions were lacking. An online youtube video I happened to find and watch in advance made it much more clear on how this should be installed. 2. The plastic case that the conversion kit came in was cracked, with a couple of pieces of this haven fallen off. The kit itself did not seem to be damaged, though.

Money well worth spending. Wish it would come with a little bit better clip. After oiling it and firing a few rounds through it, it working like a gem. Gave it four bullets cause nothing deserves five in my opinion. Make sure to buy a couple more Blackdog clips to have more fun with this setup.

I ordered one for my Bushmaster M-4, easy drop in installation,works great, just wished they werent out of stock on the 50 round drums when I ordered. CTD had it on my doorstep the next day without paying for the extra shipping! Great service from CTD as usual and a great all around product got my five stars! Order extra mags!!!

I bought this item when it was on sale. It works well after you lubricate it. No problems with it, nice item!

I bought this conversion last week, installation was very simple, and operation was flawless. Definitely purchase more magazines if you can. Thank you CTD for the awesome price and quick shipping.

Got this in yesterday as well. Greased it up and but it in...fire about 100 rounds no problem, through Bushmaster M4 flat top. super easy to switch out and a lot of fun. i will be shooting my AR a lot more now. Ill see how it handles with more round put through it but so far its great.

This is one of the best accessories for an AR. Its a lot of fun to shoot

I recently bought a CMMG conversion here locally and it wouldn't eject the fired brass. I returned it and bought this Ceiner conversion which cost me $50.00 less including shipping, and it works flawlessly! It is actually my second Ceiner conversion. One has thousands of rounds through it, and the new one has hundreds. Both work great and are a real blast to shoot!

I bought the Ciener kit from CTD a while ago after I had already bought it from another source. CTD had it way cheaper and it shipped twice as fast. The Ciener is a great buy! Both of my sons have had it for a couple months now and it hasn’t jammed once! This is an extremely awesome alternative to buying .223 ammo and it still looks cool. Contributing factor I suppose.

The conversion was super simple. My First kit was defective, but Cheaper Than Dirt fixed it. The magazine is too small at 10 rounds. Mine has never jammed and is great fun to shoot.

Kit works like a charm, installed in a matter of moments but I only put 25 rounds through it so far. Zero problems with the test. I'm using federal HP from a 550 round bulk pack I purchased from walmart. The mag on the other hand isn't that great. I ordered some black dog magazines which worked perfectly.

Well worth money. Put in Rock River Entry Tactical, no function issues at all. Need to get extra mags or you have to reload alot. If you read install instructions with kit and clean rifle, no problems.

This is a great money saver, and good for weapons handling training. It's nice to shoot on handgun ranges! However, be sure to use only quality copper plated 22LR ammunition. I removed a gas system recently on an M4 that had 300 rounds run through it with one of these systems. I had to remove the front sight, gas tube, and disassemble the gas tube from the sight. There was enough lead jammed into the system, that the lead had to be drilled out of the gas tube opening to clear it. The owner said that he had fired about 250 rounds of Thunderbolt lead 22Lr's through the rifle. After reinstalling everything, I took it out and shot 200 rounds of CCI copper-plated 22LRs and inspected it again. There was no build up at all. So these are great kits, just make sure to use copper plated ammo only!

This product is simply awesome. i have owned several .22 caliber firearms over my lifetime and this kit along with my rock river arms m-4 is the only .22LR to NEVER JAM!!! i put 200 rounds through my m-4 without one single jam, stove pipe, miss feed, or any other problem. it worked the way a gun should. perfect! i was extremely skeptical about buying this product, thinking about my past experiences with .22 cal fireamrs. every single one of them had serious issues. and would firing a .22LR round damage my expensive rifle in any way. well, it didnt. it was easy to change from my .223 bolt, to the .22LR bolt. it only took about 30 sec for me, and i was kinda slow at it. make sure to thouroghly lubricate the bolt upon changing it, and use high velocity or better ammo. i was using Winchester super X, 37 grn high velocity plated hollow point. and that stuff worked perfectly. if your looking for a cheap way to shoot your ar-15 platform rile, get this kit.

I would have to say this is the best thing i have bought for my rifle since my Aimpoint sight!!! Worked perfect out of the box, pumped about 200+ rounds through it and it worked like it was original equipment. I would say I wish i would have gotten the 25 roung mag. I bought 550 rounds of .22lr for less than $15.00. That is a fraction of what .223 would cost.

If you have an AR you must have one of these! I read all the reviews before I purchased the kit so I had a pretty good idea what it would be like when it came. I was right took it out of the box got a little emry cloth polished the chamber insert and the slide oiled it up good and it works perfect. the 10 round clip needs smoothed up to along the top of the feed lips and its as goood as any on the market but get some of the black dog 25s they are great 10 rounds just isnt enough.

I have to admit i was pretty surprised with the conversion kit from CheaperThanDirt.com. At first, like others have said, you need to wear the conversion kit in with about 500 rounds. After that your rifle and the .22 bolt will function flawlessly. In the beginning you will have a lot of feed problems until this wear period is over. GL all the accuracy on this thing is amazing at 50 yards in a 3 second dump.

I wanted to get the CMMG, however that was out of stock. I was not too thrilled to have to get this one instead. I took it to the range yesterday for the first time ever and shot 140 rounds of Winchester Dynapoint bulk flawlessly; and today 200 rounds of the same with same results. Also surprisingly accurate at 75 yards.

Works Excellent, I recommend this product to anyone looking into a way to shoot more and pay less.

I have a brand new M&P15. I ran through 200 Rem. 40gr. Thunderbolt without a hitch. FUN FUN FUN...& accurate 1/2 inch 50 yrds.

while I do not own one I use them alot when shooting and the last time I used one I did not oil anything and it still shot flawlessly after 500 rds., even after 1000 rds. and no oil it did very well with only a few jams

well worth the money! shot 300 rounds of remington bulk from walmart. performed flawlessly. just make sure you oil the hell out of it before you drop it in. installs easy, just replace the .223/5.56 bolt/bold carrier. you won't regret buying it. your rifle will thank you. shoot all day for 13 bucks!

Shoots all sonic ammo without a problem! Depending on the brand of ammo, some produce more crude than others and I recommend cleaning the rifle after 50 rounds to prevent residue from interfering with this units action. My kids love my AR and this is the only way to afford to feed their shooting habit. Have put over 2000 rounds thru this conversion unit and it continues to function flawlessly with sonic rimfire but subsonic sniper ammo will on occasion produce a stovepipe. Definitely an added value and a "must have" accessory.

i just got the kit on thursday and i have already shot close to 500 rounds of remington bulk ammo thru it and it works great. i did have a few fail to eject after being shot but you can expect that when shooting a 22. accuracy from my bushmaster m4 11.5" barrel wit 5.5" flashhider and 1:9 twist was pretty good with peep sights and within 1/2 inch at 30yds without a bench. buy the conversion and stock up on 22s u will not be sorry

I'm shooting a bull Barrel DMPS (1 in 9 twist). Off a bench with a 6X24 BalVar scope, using 60 grain Aquilla Sniper ammo, my gun groups 1/2 inch at 50 yards...that means you can hit a quarter every time. The ammo shoots dirty but I always clean my rifle after each range time. Ciener recomends that you don't take the unit apart, but I have found that it is easy to tease the unit apart with a small screwdriver, making it much easier to clean well. The unit when new, needs to be cleaned...really cleaned, as it has a rust preventative coating it and will cause jams and perhaps sticking in your chamber. Me? I'm gonna stock up on 60 Grain Aquilla ammo.

This is aboslute must!! If your tired of looking at your investment sitting in your gun safe, BUY THIS CONVERSION !!! Oil it up ,slide it in and have a blast.Well worth the money . Don't forget the extra mags. 500 rounds of .223=$250.00 , 500 rounds of .22= $20.00 . You do the math.

bought this product as a cheaper way to shoot my new ar-15. only had it out to the range one time. worked great didn't have any feed issues or firing problems. only thing that i noticed was the part that goes down into the chamber doesn't seal. not sure if that is from the chamber or if it's gas blowing down into the chamber from the gas return system. so my chamber was a mess. but no issues with the product. oh the rounds would impact a little low from where the 223 would but i expected that.

I bought one of these kits about two months ago. It functions reasonably well but I notice that if I don't take it out every 20-30 rounds and run a brush through the "barrel" portion of the unit, it becomes lined with lead. The first time I pulled out a thin cylinder of lead a few thousandths thick caked around the bristles of the brush. When that happens, bullets can go anywhere. I can't hit a target of several feet square at 25 yards. I have tried all sort of ammo, but I have settled on the Mini-Mag 40 gr. rounds. They seem to feed the best. I did have some feed problems early on, but those seem to have subsided. Every 2 or 3 mags I pull out the unit to clean it. It's no problem to do this, but I wasn't really expecting it. I have not read anything like this before. I use the kit on two new RRA LAR-15's, not it's not being used on an obscure platform. It is great to be able to take kids and their friends shooting with a real AR, and not worry about the cost (and availability) of 223. 22LR is as close to free as you can find in the shooting world.

This kit is worth every red cent. Dropped it in my Bushmaster and put over 400 rds through it with not a single flaw! Very simple to drop in and go! I would highly recommend this kit! Black dog mag works great with it.

Instead of purchasing a 10/22 and dressing it up like an AR, I decided to go this route. Glad I did! Now I can focus on one rifle AND afford to shoot it. I thoroughly lubed the new bolt assembly before using and experienced no problems on install and removal. Always keep your rifle clean and clean / brush the bore between conversions, just common sense. Enjoy!

I purchased one these conversion units and it works everytime with every brand of ammo I tested today. The assortment of ammo I tested was as follows: Aguilla 30gr., CCI Stinger 32gr., CCI Green Tag Match Rifle 40gr., Federal (550 rounds per pack) 36gr., Winchester Wildcat 40gr., Centurion 40gr. Out of all these tested not a one failed to function and the accuracy was something else. I have a Armalite AR, 16 inch barrel, 1 in 9 twist, with EO Tech 512.A65 Holographic sight. Like I said the accuracy, I was impressed especially with the Aguilla ammo. All the articles I had read previously said that the 40 grain bullet was the best. I beg the difference for I found all the ammo I tested worked, shot, grouped very well with no misfires or jams. My cousin was also impressed for he has the same convertion unit as I have, he also had great experience. CheaperThanDirt yuo have a winner here and I guess I'll be shooting more 22's than the 223 round.

Great investment...have 2 and they work great in my M&P-15T and my Bushmaster....get the black dog mags more fun

If you are looking for fun cheap and quiet plinker on your AR then this is a solution. But there are side effects tho this conversion. 1-You need to spray CLP before the installation for it not to get stuck. 2-The blow back (back fires) from the gas tube will blow dust and particles on your face and cheeks...that hurts! And this kit would not accept PRI gas buster neither, seriously wear glasses at all time. 3-Until the bolt break-in in the 5.56 chamber some chunk of materials and metal maybe lost during that process. 4-There will be gum and heavy residue left on your upper, lower, and especially gas tube...spend 2 hours cleaning it if you don't mind. Other than the above it is quite worth what you paid for.

I ordered this item on Monday along with some Black Dog mags, received it all on Thursday! I went out to the range today with a brick of cheap 22 ammo, "Federal Lightning" that cost me about $10 last summer. I shot 300 rounds through my M&P-15 with this conversion and it performed flawlessly. The grouping was about 1" @ 40 yds and I punched the same hole several times while sighting it in. Rapid fire performance was excellent. I am looking forward to next weekend!!

I bought it directly from Ceiner. Install was so simple it worried me, works in Bushmaster and Colt great. Worst part is now I gotta buy more 22 lr ammo and another kit so both of my grandsons can shoot at the same time. Black dog mags are a must, Ceiner mags have negative air pressure....they Suck, BIGTIME. Spend the $30 for the mag.

I bought a Ciener kit and was excited to begin saving money on it. It installed easily in my model 1 sales/bushmaster gun. However it did not feed or cycle with any of the ammo I used on it. When I took the upper off and tried to remove the conversion kit, IT WAS STUCK. I cannot remove it, it will not come out. So my entire upper is out of action. That means I can't return the defective part or shoot my gun! And forget about talking to the manufacturer, they dont answer the phone, and the warranty section of their website isn't there. HORRIBLE, now I am out $200 and whatever the gunsmith charges to remove it!!!!!

I've been sitting on the fence for years now about whether to buy one of these for several reasons: 1) I wasn't sure they were accurate. 2) I didn't understand exactly how they worked, so I was worried if they could possibly damage my weapon. 3) I have heard horror stories about buying them from Ciener himself regarding lead time (6-12 months!) and other issues (seriously, there's a website called www.donotbuyciener22lrconversions.org). Well, I just got mine (ordered Monday morning, arrived Wednesday afternoon; that's what I'm talkin' about!) and I am able to hit beer...I mean, soda cans from about 50 yards with little trouble (iron sights, mind you), and now that I can see how it works, I am not in the least worried about it damaging my rifle. If you're curious about that, the tube you see to the right in the picture is a "liner" for the OEM chamber that basically extends the barrel and creates a new chamber further back, and the bolt carrier is completely contained in the unit you see, i.e. this conversion makes no use of the rifle's buffer spring b/c it has it's own, and the travel of the bolt is only the length of the conversion. So, if you are like me and thought the conversion was a straight replacement bolt carrier, that's not quite how it works. The good news is that all of the moving parts are contained in the conversion itself, and they make no use of the rifles components. There's a little more to it than that, but that's the basic idea. Check out my review on the Blackdog mags for this conversion as well! Thanks CTD!

I kept looking and looking and looking at this page, wondering if I should buy this or not. I finally took my chance and bought it with no regrets what so ever! I had previously bought it for an M16A2 upper with a semi-auto lower AR-15 and it works great on that! However, on my M&P-15T, the bottom of the bolt for the conversion keeps getting caught on the bolt catch every time it goes back to insert another cartridge into the chamber. Other than that, I have no quarrels with it what so ever. I just thought it was weird since it worked on one AR, but not the other.

I can't believe I waited this long to buy one! Took it out of the box, oiled it up, and it worked flawlessly. Installs in seconds. I used 38gr "mid-grade" coated HP's, and it was still accurate out well past 50yds. Blackdog mags are a MUST!!

I read a review saying this kit would not work with the S&W MP15. I have a Colt, 2 DPMS, and a MP15. This kit works well with all. I have only had a couple of jams in over 700 rounds fired. I have two black dog mags which work well too. Accuracy is very good, and this conversion is big time fun. Get one.

Anyone who does not love this conversion must not know how to use it! I bought this last week for my m-4 and this thing rocks! I fired 40 gr and 35gr rounds thru my weapon and it never missfed ....not even once out of 150rds fresh out of the box! this is a great way to shoot the ar-15 family more often and expend cheap ammo. The clean up after was very easy....not much left behind, I have read where some people say it gets very dirty, however if you were ever in the military and used a blank adaptor and fired 100's of blanks. the m-16/ar-15 would still fire live rounds after words with a good cleaning. .22 rimfire rounds are no where as dirty as 5.56 blanks, so there should not be a problem with fouling......great buy....GET ONE!

got this about 2 months ago and to be honest, It was a nightmare using 36 or 37 grain ammo.but once I put cci or winchester 40 grain in the blackdog mags, i was going threw 500 round bricks like it was going out of style.In my shooting I had a lot of fouling after. had to clean alittle after 700 rounds. all good though. I would recamend this just because its alot cheaper to shoot and safer knowing the rounds cant go to far. the range I shot at was 85' max 25 shots all within 3" so i would say pretty good I here it drops after 25 yards.

I received my conversion kit late last week. I finally took it out to the range expecting minor problems since I had seen some negative feedback. I shot 200 rounds of CCI 40grain ammo and did not have a single misfire or jam. The 10 round clip does not catch therefore you have to be careful to count the rounds. The solution for this is to purchase a much cooler looking high round mag. Overall, I was not disapointed and expect the product to last based on its first days performance.

This thing is the coolest and most cost effective thing you can do to your AR 15 you pay 5 cents a shot instead of 50 GREAT BUY!

I bought this conversion a month ago. Its the best investment i made yet. You should buy the BLACK DOG MAGS and throw away the ten round mag. that comes with the kit. Then you don't have to worry about counting the shots because with BLACK DOG MAGS it always leaves the bolt open on the last shot so it doesn't break your firing pin.

I bought this for my DPMS AR-15 a couple years ago. Since the 10 round magazine does not have a follower, after 10 rounds you'll dry fire if you don't count the shots, causing firing pin breakage after 3,000 rounds. NO JAMS, NO FAILURE TO FEED, NO PROBLEMS! Parts are available online, I got a new pin for $10.00 put it in myself.. THIS KIT IS A MUST!! You will need to fire about 10 rounds of .223 to clean the gas tube after 1,000+ rounds. This is the BEST buy for an AR-15.... YOU WONT REGRET IT!!!!!!!!!!

This conversion is well worth it. I should have bought it years ago. I was very amazed at the noise reduction. It was a lot more accurate than I have heard other people say that it was. It's a lot more comfortable to fire the gun than with the 223. Now I'm going to safe all the 223's for armageddon and go use the 22's. To see it in action go to www.youtube.com/user/todar15.

Mine has functioned flawlessly.I have had no problems what so ever.I did clean it with a bore brush and patch before shooting. I also lubed thoroughly with Breakfree CLP.I also clean it after everytime shooting. My kids really enjoyed shooting an AR15 .I have an M4 with the tele stock and it fit them perfect .They were hitting the bullseye at 50 feet.I love saving money on ammo .You learn your sights and trigger pull with this unit too.

I bought one today, it jammed like hell, squirted a little oil in it and that greatly helped it... After about a hundred rounds the bolt really freed up and is very smooth and broken in. Love this product. Very fun!

On 6/1108 I wrote that I had some problems with my unit initially. I've shot it a lot more and haven't had any more problems. It seems the phosphate (?) coating on the bolt and rails was causing some drag. Now, the bolt and rails are steel-on-steel and the kit works fine. One rater said the .22 rounds clog his gas tube. I'd suggest shooting copper jacketed/washed .22s. I don't have a problem using them. But, I still fire a few 5.56 rounds every few hundred rounds of .22LR. Great product!

Works great in my Bushmaster. Really fun, accurate, and cheap to shoot. I know that for the price you could buy a 10/22, but then you would have to trick out two guns instead of just your AR. The Black Dog mags worked fine for me. Overall, a good value.

I got this item a little over a year ago ,,It's the real deal for cheap AR shooting worked and fed all the brands of LR. ammo I tried When you change back over to 223 you need to clean the gas tube and run several rounds through it to clean it out because the LR fouls the gas block and will not cycle the 223 round No big problem... put some heat in it and your good to go Now for the but ,,, after several 1000 rds. the fireing pin broke .. haven't sent it for repair yet ,,will let you know how this went later

Took it to the range today. Shot CCI mini-mag and Winchester Super X through it. Both are 40gr high velocity 1300 fps rounds. All shot and cycled flawlessly. Point of impact is a little different than that of my regular .223 rounds, but that is to be expected. For the price I'll save in ammo alone, I can afford to get another scope and zero it for the .22 rounds and swap scopes at the same time I install the kit. The kit fits and works perfectly in my Bushmaster. Had a little delivery issue - not caused by CTD, but by Fedex. But CTD stepped in and helped track it down. I got it a day later than I thought, but 1 day compared to several weeks if you try to order this straight from Ciener, is a real bargain.

All I can say is this kit is the best value around. My friend and I put 650 rounds through it the first day with only about 3 jams. After the first 4 clips no problems with jams. I suggest you oil and clean before using for the first time and make sure you use copper coated 22 LR ammo. Make sure you buy a second clip. 10 rounds go fast so you'll thanks me later. I can't imagine my AR without one now. $12 for .223 20 per box or $16 for 22LR 500 per box. SOLD!

This is a must if you own an ar-15 and aren't rich. Make sure you shoot 40g ammo or you lose accuracy!!

Decided to give it a try due to hi ammo costs for .223. Was a bit worried about all the neg feedback I've read about Ceiner, but mine arrived quickly and operated without fault. It even worked with some .22LR that I've had for 7+ years! Not quite the kick of the new .22 ammo I bought, but it shows that you don't need much recoil for it to cycle. That's a good sign for some of the special Aguila ammo, such as the sub-sonic. I give it 4 out of 5 due to price. Given the demand, I don't know why there aren't more makers of conversion kits, which would help drop prices. In the meantime, it's a good buy and worked just fine for me!

First of all, let me say this is a well made, very dependable conversion kit...I just ordered my second from CTD. I am very pleased with the results. I own 4 Ciener kits. 2 for my AR-15, one for my Beretta 92FS and one for my 1911. JAC makes the best conversion kits PERIOD. Just for comparison, I do own 2 Advantage Arms kits (1911 and Glock21) they are good kits BUT the JAC's are BEST. Always metal mags, (AA'a are polymer), and very well thought out. Sure, some say he is an ass, no customer service, slow to ship, etc, etc, etc. Yup, this may be the case but I have NEVER read of a case where JAC doesn't deliver the product..sooner or mostly later. He may be slow and a total jackass at customer service but he is NOT a crook. Paitence is a virtue, read their website, they do say they are "SWAMPPED" with orders. I placed an order (from JAC directly) for 2 pistol kits and a pile of 30rd AR-15 mags in Jun 2008, order rec'd in Oct 2008. Delay-OK, I read their website and understand the delay. I just now ordered another AR-15 kit from CTD, you pay a little more (vs direct from JAC) but get it faster. I ordered mine from CTD because I want it fast...before election day. If the wrong person gets elected, we may find the 1994 CB re-enacted. I was just getting into guns in 1994 and it really sucked paying $69 for 30rd mags for my 10/22. ...once bitten-twice shy...

This is a fairly good product. I received mine within 3 days as was promised. The kit works fine. The mag fits fairly tight. It will not fall out on its own, but I didn't expect that. A little filling helped. It jams about every 100-200 rounds which is pretty good. It does build up a lot of hard carbon but it is nothing that a scraper and some cleaner can't handle. It takes about 20 seconds to put the new bolt in and it slides right into place. When charging the weapon the handle only goes back about 2 inches. The charging handle will also not lock to the rear. It is very accurate at 25 yards. I had to move my rear sight up 3 clicks and then I was dead on (at 25 yards) Overall it is a great product that will save me a lot of money. I would recommend this to anyone who is interested. Also just as a warning only shoot copper jacked rounds. The all lead rounds will screw around with your barrel and gas system.

I purchased this to save money on ammo. I do save money but it is not very much, I go shooting twice as much now. I am more than pleased with this product, you can easily interchange the bolt in a matter of seconds. I own a Bushmaster AR-15. I recommend buying several of the additional magazines, you will want them once you go through a few rounds. Go ahead, just get it, you wont regret it. Thanks CTD

This kit works well with my Rock River AR-15, but the firing pin broke after 5,000 rounds. I saw some of the reviews that had the same complaint. We should all write Arthur Ciener and strongly recommend that the firing pins for the AR-15 conversion kit be made of titanium or offer titanium firing pins as an option. I would be willing to pay $20 more for this feature.

This is the best thing i ever done on my AR-15. The .22LR conversion performed flawlessly not a single bullets jammed. I fired 2,300 rounds on a single day from CCI Stinger,CCI Mini mag, winchester, Remington, American Eagle, Federal, Remington subsonic, Agiula. If you love to shot and keep up with your training without breaking the bank. I highly recommend this great product.

went to the range with my bushmaster m4 a3. i was able to put well over 350 rounds down range with out a single hickup. i did notice that if you hold the triger just right it will send all of the rounds down range. but that is just a shooter issue. the converstion kit works as it should. i would reccomend that you buy the large cap. mags for this. 10 rounds is just not enough. very accurate. i even broke a few plinking targets. the system takes a lil thought to clean well. and if you dont keep track of how many rounds where shot, after the last one you will have to pull the charging handle to the rear to put the weapon on safe. but all in all. this is a great product. great for training and for fun. i have told everyone that iknow that has an m16/ar15/m4 to get this. so much cheaper on bullites as well.

This conversion kit is one of the best investments since my Stag Arms AR. It shoots flawlessly. Just yesterday I was shooting jack rabits with this plus my Aimpoint Comp M2 and couldn't miss. I will give this 5 bullets anyday, but I also strongly recomend wearing eye protection while shooting this because I have been hit with some fragments of hot gunpowder while shooting this. But don't let this discourage you to buy it because it doesn't happen that much, isn't that bad when it happens, and is just something a lot of semi or fully automatic guns do.

The first time I used the Ciener kit, I had a lot of failures-to-feed, even tho I'd cleaned and lubed it before shooting. I took it home, cleaned it and lubed it and then lubed it some more. I just got back for shooting high velocity 40 grain loads and standard velocity loads and it ran like a top, except for the first round that failed to fully eject. The kit is more accurate than I can hold. I'd recommend it for anyone with an AR-type rifle. One of the reviewers had problems using the kit with his S&W M&P15. I've got the -15T version and don't have a problem with it as long as it's well lubed. Not many things are fun and inexpensive these days - this is one of them.

This kit works very well with the factory 10 round magazine. No malfunctions in about 100 rounds with that mag. Shoots into 1" at 50 yds in my Bushmaster Carbon 15, which has a 1:8 twist barrel. The two Blackdog 30 round magazines I bought gave me a lot of trouble with jams. They are the older, skinny style magazines still available. Empty cases kept jamming between the end of the charging handle and the kit. It took awhile to figure out that you need to leave the charge handle forward and push the bolt back with your finger to clear it. Cases and case pieces jammed in other locations also. The plastic mags seem to drag on the bolt as its cycling. Even with some smoothing and trimming, I couldn't get them to work. I plan to return the mags and buy some Ciener 30 rounders. It was very cool seeing bullet holes appear in the target down range without much sound and no recoil. This kit is a great option to have and should work very well in teaching shooting to any new shooter, but especially children.

I have both the original military M261 as well as the Ceiner M16 conversion kits and love them both! The Military surplus M261 is semi only but works perfectly with the 10 round mags that fit inside a .223 mag, the Ceiner can fire in full auto only if you buy the kit specifically for the M16, it has a Sear Trip to operate the auto sear included with it that the AR15 kit does not have, (of course unless you have a M16 you don't need that part) in a registered receiver M16 it works very well at doing 30 round mag dumps with little maintenance. These kits are lots of fun, a lot cheaper to shoot and the point of aim is only about 6" lower than .223 at 100 yards. I frequently use mine with my Gemtech Out Back, Aquilla 60 grain SSS and a 1in 9 twist barrel, it is very quiet and very accurate. It is like the SSS ammo was just made for this application! As for cleaning your .223 gas system I always make sure to carry a mag full of .223's with me and just fire them when I am done for the day, this cleans out the gas system and ensures the firearm is ready to operate next time (though I have never had a problem) I would definitely recommend these kits for anyone wanting to have fun plinking for less $$$. Ammo these days in out of sight! Excellent investment for the money, sure to bring a lot more use of your AR15 than firing .223 alone. Buy one and enjoy your time at the range

I purchased several of these after I used a friend's .22 kit, (I tried to wear it out). A little stiff out of the box but all work excellent after breaking in. You can either shoot it or lightly run a flat file over the slide rails, top and bottom, to break it in. You are NOT filing to remove metal just to "wear" it in, smoother than it is. These kits like generous amount of REM-OIL spray (Item #: 66946). I've shot mine in both full-auto and semi-auto with no mechanical problems. Black Dog mags are an excellent accessory for this kit as well.(Item #: MAG-081). Accuracy is decent out of a "old" 1-12 twist 20" M16 barrel using Fed Valu-pak ammo. Bowling pins at 100yds, open sights, every time. Don't expect match accuracy.

The kits works well enough. I find that the firing pin is good for about 3000 rounds before it's FUBAR. Get some spares or learn how to make one from a AR15 firing pin.

Took mine out to the range today. Worked good for about 30 rounds then everything failed to extract. Took it out and the extractor and was chipped and was no longer grabbing the round. I put the original carrier back in place and it now wont cycle properly with .223. When I went to clean my AR15 I found the bolt carrier key was damaged because the 22 shells that failed to eject bent the gas tube so when the original bolt carrier was installed it hit the key and nicked it. When I got home I found the OEMs site for the conversion kit had all of the contact pages broken on their web site. They list the part as only $ 5.00 but show no instructions on how the unit disassembles to replace it. A search of the web shows numerous bad reviews on customer service and how they are so back ordered they don't answer emails or faxes. For the people it worked for congratulations but the chance of it breaking the firearm is not worth the price.

All the reviews looked good, thought I'd give it a try. Glad I did. 30 seconds to change, fires like a charm. Still lots of fun to shoot. Way cheaper. Nicer for my daughters to learn on. I still like to shoot .223, but this is a great alternative for casual plinking. Highly recommend it. Well designed and built.

I bought this conversion kit when I bought my new Bushmaster M4, and this is easily the best firearms accessory I've EVER bought. Given the price of .223 these days being able to shoot .22 is a huge bonus and a big part of the reason I bought the rifle. Using an AR-15 as a .22 plinker definitely makes it the most bad-ass (and fun) plinker around. If you're out for fun shooting like me and can't thousands of rounds of .223, buy one today. I also bought one 30rd. mag and it definitely wasn't enough- buy a few.

I wrote a review a while back about my new conversion kit, I must say it's getting better. I quit using the Remington ammo with a wax coating and started using Federal and I'm getting better results. I could have sent the kit back, but for the money if it keeps improving it will be well worth the trials. The other thing is that I only shot about 100 rds of 223 so the blue finish wasn't even smothed out yet on the moving parts. The gun is so fun to shoot in 22lr. I'll continue to give feed back on my conversion kit. Even if I don't ever get all the perfect shots like some of you have had it's still a awsome investment when you look at the price's of 223 ammo. Thanks John 3:16-17

I was thinking I wanted a dedicated .22LR upper, but I really wanted to use my current optics, as well as having the same weight and feel, etc, so I went with the conversion kit. I'm so glad I did. I see 1 or 2 horror stories posted here, and I feel for them, but I guess you can get a lemon with anything. Mine worked perfect right out of the box. I have had 1 stovepipe in 500 rounds of bulk Winchester ammo, and perfect performance with 1000 rounds of bulk Remington. That's around $35 of 22 ammo. 1500 rounds of .223 will run you $500 at least. I say, if you're on the fence about getting one of these, just go ahead and do it. Yea, the price has jumped up $30 recently, but don't wait till it goes up even more. You'll save the cost of the whole thing in one afternoon at the range. Get a few of the blackdogmachine 30 round mags as well. They are good quality for the money and you will definitly want at least a couple. The 'smoke' ones are dark enough to look 'cool' and still let you see what you've got left.

purchased the ceiner 22 conversion for the s&w mp-15. have 600 rds through it and it has been flawless. clean and oil every 200rds. lets see?, 200 rds of 223 approx. $75.00 200 rds 22 LR approx.$5.00. not bad.oh, also purchased the 30 rd plastic mag. works fine also. bob

I purchased the Smith & Wesson MP-15 I bought the conversion kit to save on ammo. The conversion kit is very accurate but my gun will not shoot two rounds without stove piping the spent case for which you have to remove the kit to get the shell out because it gets caught between the charging handle and the conersion assembly. I called tech services and they told me for some reason the kit doesn't work right on the MP-15 so it's not the kit it's the MP-15 I hope they get the problem solved because I love how it shoots just hate taking the gun apart after a shot or two. JOHN 3:16 Steven in Sun City

Definately a good investment. I have an RRA and this conversion works great. It particularly seems to like the cheap bulk packs of 22lr. Accuracy is pretty good and becomes down right respectable with 60gr Aquila Sniper Sub Sonics. Even with sustained rapid fire you are at no risk of harming your barrel as you are with 223. Your rifle will get dirty quickly however, so take an aerosal cleaner along if you plan on going through more than 1000 rounds. My cycling reliablity went up dramatically after smoothing the surfaces by disassembling the unit and tossing it in my brass tumbler, which I highly recommend.

I absolutely love this mod. It works great and hits accurate to at least 100 yards. It's great to go from paying 20 dollars for 20 .223 rounds to 10 bucks for 500 rounds of 22 lr.

Received my conversion kit and took it to the field. It was simple to install (no special tools). If you can semi-field strip your ar-15, you can install this kit in about 60 seconds. No exaduration! It fired without a jam and for close quarters training or just plinking - its a blast. Cheap to. My young daughters always want to fire my guns.... this is perfect for them to handle and build confidence with a full size weapon.

I see that a lot of people have had success with this product. Unfortunately I have not (yet). I have found that my Ciener kit will not go completely into battery. The bolt face simply will not close once it is installed. It appears that it is getting caught up on the bolt catch. It's hard to see from the mag well you can easily feel it when you put your finger on the bolt catch release button and let it shut. Anyway, I'm trying to decide whether to return the thing or do some gunsmithing on it (which will certainly void any warranties and preclude me from being able to return it. Good luck with yours. Robert

Great buy, as simple as you can get install, been working for months now with my Olympic Arms AR-15.

Just recieved my kit on thursday ,great service. Went to the range Saturday with it. What a blast to shoot. Shot a brick of Winchester Super X copper washed High Vel and worked great ,not one fail to fire or jam!!! After I ran out of 22lr I switched back to .223 . Took about one minute . Then shot a twenty round box thru it. At the price that .223 is going for this is great . 3 cents per round VS .30 to .50 cents a round. Time to stock up on .22LR ammo!! I will be converting my 1911 pistol soon also and maybe my AK-47 . I also want to get a 30 round mag .

I received this item today, went straight to the range with it, and fired 500 rounds (high velocity cartridges) through it without a single misfire, or misfeed. It is also surprisingly accurate! I highly recommend it!

Get one then get a bunch of 30rd mags. You will save lots of money on ammo. Your wife will love you more not spending money on .223.

First the service was great. I placed my order on Thursday and received it on Monday morning. If you own an AR15 you should have this kit. It fits and functions as claimed. I will shoot the .22 and save enough to pay for this kit in no time. Reggie

This conversion is great. It is easy to change, cheap to use and you can shoot in indoor ranges. The only draw back is the accuracy and mags. The accuracy could be better but I haven't not spent much time on that. The mags should all be 30rd and cheaper, but those are the only draw backs. Great for plinking and fun target practice. I have a converison for my Glock, but that doesn't always work unless you have the right ammo. The AR-15 conversion, will jam a little bit with the wrong ammo, but not as sensitive as the glock. Good deal.

I didn’t think I would use this all that much but thought it would be nice to have so my rifle could shoot .223 and .22LR. Now I shoot the 22 LR more than anything. Since my wife and kids have started shooting the AR conversion is what they prefer. My boys will almost shoot a whole brick in one sitting and this conversion keeps working. I have never had a problem with it. I am saving so much on ammo. I am glad I purchased this.