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YHM AR-15 Diamond Series Free Float Rifle Quad Rail

Yankee Hill Machine
Typically ships the same business day when ordered before 4pm CST.
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This unique forearm features diamond shaped heat vents, an extended top rail for gap-free installation, "T" marked rails to mark accessory locations, and utilize anti-rotation screws for a secure installation. The forearm and barrel nut are made of 6061-T6 aluminum and hardcoated to military specifications. The jam nut and anti-rotation screws are steel and plated with a matte black finish to match.

Features and Specifications:
Manufacturer Number: YHM-9635-DX
Forearm and barrel nut are made of Mil-Spec hardcoated, 6061-T6 aluminum
Jam nut and anti-rotation screws are steel and plated with a matte black finish
Rifle length.
Overall Length 12.5"
Weight 1.25 lbs

One jam nut
One barrel nut
Two anti-rotation screws
One forearm tube.

Does Not Include End Cap.

Carbine Length: ARR-9630
Rifle Length: ARR-9635

For warranty information, please contact:
Yankee Hill Machine Co, Inc.
20 Ladd Avenue, Suite 1
Florence, MA 01062

Item#: ARR-9635
Total number of Reviews: 26

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5.0 5
"I purchased the YHM rifle-length diamond free-float quad rail and installed it this week. I have been looking for a light-weight quad rail for some time and this was exactly what I was looking for and at the right price. It feels slightly more sturdy and substantial than the YHM light-weight quad rail and is well crafted. It is slightly larger in diameter that a standard smooth free-float tube, but this is to be expected. The diamond pattern looks great, allows excellent air circulation (cooling) and ends up being fairly light. YHM has a great reputation and this product is solid. It is not quite as light, smooth and precisely machined as my LaRue Tactical 13.2 rail ($330), but it is more than worth the price. I had a little trouble with the anti-rotation screws seating deeply enough, but was able to resolve this with a little work. My only complaint is that it looks a little unfinished unless you purchase the screw-in end cap (sold separately)."
5.0 5
"This is an awesome rail at an awesome price. I just installed it on a Bushmaster with rifle length gas system and standard iron sight with no problem at all. I haven't had any issues mounting Daniel Defense tactical light mount, scope or sling adapter."
5.0 5
"I got this to install on my carbine length AR. I could not be happier. No issues with low profile gas block like other cheaper rifle length float tubes. It looks great and is very light. I had some trouble removing barrel nut, but install was smooth. No issuses with set screw, and I got the top rail lined up perfect. It gave me the look I wanted without the huge price tag. Thank you YHM and CTD great as always."
5.0 5
"As I build my toys I hate wasting money on stupid stuff like National Match widgets, and other over priced crap that doesn't make a gun shoot straighter or last longer. Forearms fall into that category. When I found this piece I was pleasently suprised. It's very well made, has great features, and is an excellent value! I ordered 3 of these. They were all finished well, and come with a perfectly suffient mounting system. Yes, there are others out there at 2-3 X the price, with crazy huge mounting systems. They are overkill. If you need, or want, a rifle length quad rail, this is it!"
5.0 5
"Great fit and finish and looks damn good on my Rock River Entry Tactical! Cheapest place I could find it and it was at my front door in 2 days! Thanks CTD!"
5.0 5
"I was surprised to see scratchs and dings on it when it got to my house but, they were only on the bottom so it doesnt bother me too much. You would just think it would be smarter to send in a box instead of a bag? Other then that, it is a great product and I would reccomend it to anyone. It looks sweet on a 16\" barrel."
4.0 5
"Actually ordered two of these rails but not for the reason most would think. Got my first one and the bag YHM sends it in was totally destroyed, holes at every slot and everything. Screwed it onto my stripped upper and I noticed something was odd; the extension over the barrel nut was bent with a nice flat spot on a corner. It was obvious that some monkey had dropped it before putting it in the box.Second one was in better shape but it still had a couple dings and blemishes, not nearly as bad as the first but still they have them banging together on a shelf in the warehouse. First CTD rep said call YHM for a warranty claim... right. Cross shipping and other stuff later I have what I need, barrel nut had to get sent out for the barrel assembly process, this must go on first if you have soldered muzzle devices with standard gas blocks (non 2-piece).Good deal, good rail, just cross your fingers and tell YHM to buy dollar cardboard boxes for their rail."
5.0 5
"I ordered this item wanting to get a look from my gun that is different than most. I love the rifle length handguard; it makes my AR look more aggressive and finished. The Guard came in two days, and was in perfect shape. Just remember that you will need to get the YHM end cap. It is a cap that threads into the end of the handguard to give it a finished look. Also, you will have to order some fill screws because they do not send you enough to fill all of the empty threaded holes on the guard, they offer them at YHM."
5.0 5
"nice quad rail!! installs easy and stays secure. mounted to my spikes upper and the rails meet up perfectly. i also installed the end cap on it. it gave it a nice finished look. i have other rails i have spent Alot more money on and this is my favorite. it looks great and is solid as a rock."
5.0 5
"I got this from CTD and installed it today. It seems to be a great quality rail and looks great too! My only complaint is that there is a pretty good ding on the corner of the left rail at the muzzle end. It shouldn't cause a problem but its still not something I expected to see. Not sure if that is YHM's fault or CTD's but I still give it a 5 rating. Very quick shiping as well!"
5.0 5
"Mine came in today, and from the looks of the packaging someone heard the complaints. Mine was tightly wrapped in plastic,surrounded by cardboard paper packing in a box. IMO this is way under priced for what u get."
5.0 5
"Just received my rifle length rail from CTD. YHM or CTD has resolved the packaging issue and mine showed up in first rate condition. This is the second rifle Ive built with a YHM rail and you cant beat the price for the quality of this rail. Other companies want twice as much for the same thing. My STAG ARMS rifle looks great with a 12\" free float on it. The diamond vents give it a very aggressive look. I didnt order the end cap and dont mind the open holes so I guess its a matter of personal opinion on that. Thanks YHM and CTD for a great product at a price that doesnt empty the bank account. I will be ordering more of these."
5.0 5
"Once again CTD does it again, excellent shipping. not a scratch on it. This YHM rail is very well made and u cant beat the price. My only complaint was I couldnt get the forearm end cap from CTD."
5.0 5
"First off I have to say both CTD and YHM customer services were great. My rail showed up in great condition but was missing the locking screws. I called CTD and yhm and they got the parts right to me. As for the rail this thing is a great buy. It's surprisingly light weight and goes on smooth and easy. I'm getting a second for another build and so is a buddy now"
5.0 5
"This is a very well built product. It went on easily and really makes a nice, seamless transition from the flat top to the rail. Nice fit and finish. I put this rifle length handguard on my carbine and really got the look I was after. No more gas block to look at!"
4.0 5
"CTD offers an unbeatable price for this free floater, but with a few drawbacks. You might as well call Yankee Hill Machine up and tell them you need the anti-rotation screws that are supposed to come with the handguard. Print the installation instructions on Yankee's website while you're at it (didn't come with that either). I'm pretty sure I received a returned item. I could see the slight marring inside the handguard where someone contacted the barrel while installing the handguard over the barrel (no big deal to me though). I'm still happy with the overall quality of the handguard, barrel nut, and jamnut. Shipping was fast too. It was just inconvenient to call CTD, then YHM, then wait for my screws to finish my build."
5.0 5
"My handguard arrived quickly and in perfect condition. Unlike some of the other reviews, mine had all the parts, including the instructions, anti-rotation screws, jam nut and barrel nut, as well as the handguard itself. It fit perfectly with my slick side upper receiver and barrel. It is solid as a rock, light weight, and it looks really cool with a 16\" barrel and YHM flash hider.I am very happy with CTD and YHM."
5.0 5
"Really solid free float handguard. Looks great, great quality. Mine came with everything to be installed. No hiccups or snags on the install. I was skeptical about getting this one, as the tube looked big and wide, but it really isn't. I am totally glad I got this one."
5.0 5
"I got this free float rail in about four business days for a lot cheaper than the YHM website, or any other site, for that matter. Being new to the AR platform, it took me a little longer to install it with the low-profile gas block from YHM. But now it is finished and is perfect. The rail feels solid and came with everything in the description."
5.0 5
"This is my first purchase from CTD, as well as from YHM. If you are on the fence about a quad rail, get off it and buy this one. I gave my local FFL a chance to meet or beat this price and he couldn't do it. For what you are getting, the price cannot be beaten. I shopped for a week solid before I came back to this one. The quality is solid and it looks outstanding on my weapon. I was a little put off by the shipping cost and the level of protection that is provided for that cost, but these guys have to eat, too. This will not be the last YHM product I purchase."
5.0 5
"I've had this for one year so far. Locked it down as hard as I could. Not that hard to put on, but need the tools. Hasn't moved yet, but I did put a hard rail cover from the upper to the rail just in front of the scope mounts to ensure no small movements. Lots of complements on the range for looks, but just does its job. Thanks to wife for good Christmas present in 2011."
5.0 5
"I'm new to the AR15 and gunsmithing it so this was a fun experience. I was unhappy about how much barrel a standard carbine handguard shows and wanted something longer. this fit the bill and the budget as most other high quality rails are expensive. The only thing that I don't like is that the top rail (for mine at least. Don't know how others were) does not continue the flow. I.e. a one piece base can't go from receiver to rail, but that's not even enough to bug me as I don't plan on putting anything there except an aimpoint mount. I am very pleased with this rail and YHM and CTD!!"
5.0 5
"The price is great and the quality is even better. All of my accessories fit flawlessly as the other slightly cheaper rails did not. By looking at the other YHM parts I wouldn't expect anything less, very pleased. Thank you CTD for the great service and fast shipping. Time to shoot!"
5.0 5
"I couldn't be happier with this product. I got the rifle length so it does add a little weight but it gives the rifle a very aggressive look and all my accessories fit perfectly. I would suggest a vertical grip with this item because quad rails aren't the most comfortable to grip."
5.0 5
"Superb quality and with lo pro gas block adds awesome look and functionality to any AR."
5.0 5
"This product was cheaper than any others I looked at and was a perfect fit."