When in the down postion the sight is still very tall and in the way. After firing my second shot with it the sight would bounce out of place for every shot afterwards. Skip this and spend the extra couple of bucks for a better one.

First time I used this sight I shot through the 10 X ring. However, the target was in the next lane over;-) I put my micrometer/protractor on this puppy and it is not precise. The housing holding the flip sight is out of square and or bent. Not well put together. Hopefully mine was just a lemon. I have been getting my share of lemons lately on gun parts from China. It seems quality control is hit or miss there. Semper fi...

This is an ok BUIS. Its very sturdy, holds zero. Only cons are that the "knob" is made out of a soft metal and the sight (in the down position) is still pretty tall, so much so that it is in the way of potential magnifiers/optics etc. Overall good buy though.

I got this sight because the Pro-mag I had my eye on doubled in price overnight (only to be listed at the cheaper price in the catalog sent with the order). This sight seems to be real bulky for a backup sight and is maybe 1/4" to 1/2" shorter when folded. On top of that the knob for attaching it to the rail is deceptively huge and really tacky looking, like something you would find on an airsoft gun.

This thing lasted exactly 2 rounds. First one was fine. On the second round and every other round thereafter the sight kicked back to the down position from the recoil. This was used on an M4 carbine type AR in 5.56 mm. This would be great for a .22 lr or an BB gun. But nothing with even moderate recoil. I send it back the day I got it.

This sight works perfectly. Holds zero no matter how many times i flip it up or down. Cheap price, but made well.

I put this sight on my Ar-15 and took it to the range to dial it in...first three rounds i fired where dead center and all touching each other, i was amazed i did not have to adjust the sight. Locks upright strongly and have shot 500 rounds with it. Great buy!

I dont really know what all the complaining is about. This sight works great! Only thing is, once you get it sighted in make sure to tighten windage screw. And the part where people are sayin it comes loose, just use some Blue LockTight... Its not permanent and holds tight till you need to take it off.

This is a nicely made item, at unbelieveable price, works fine, all parts and operation are identical to the factory sight in the carry handle. The only complaint is that under heavy recoil from .50 Beowulf the mounting screw gets loose (I only tightened it by hand). Using a drop of blue (non-permanent) loctite fixed it. I don't ever need to mount/remount it because it is a flip sight.

I bought this for my AR thinking....cheap, should be reliable, and cheap is good enough mentality.... This thing is a turkey.... the pivot pin that allows the sight flip easily comes off....you can hammer it back in...but it will come right back off...it simply can't handle the recoil of the rifle..... I should have just saved some money and gotten a better one.... ALSO the whole thing comes loose after a few rounds...it simply can not handle the recoil

Was planning on using this sight as my BUIS when I recieved my EOTech. Haven't bought the EOTech yet, though, so I've been using it as a primary - I've fired roughly 300 rds through the rifle with this sight, and now the sight flips back on it's own from the recoil. I'd hope that after 300 rds. even a back-up sight would still function - I'm very dissapointed. You get what you pay for - if you plan on actually USING your BUIS, get something decent.

Great sight. Locks nice into place and folds down and out of the way when using the scope. Fits nice, and stays in place.

Outstanding rear sight for the money. Mounts up very solid and was a breeze to adjust.

My only complaint is that it doesn't "lock" in the up position. It is sturdy when it is up, but it doesn't lock. It "could" possibly be knocked down, if bumped. It has not been a problem though, just an issue I foresee could happen. It looks good, feel sturdy. Doesn't wobble. I like it just fine.

This is actually an A1 rear sight system. (no elevation adjustment). But is good and sturdy for a BUIS. Not nearly as accurate as a MaTech 600m buis though.

Save your money on this sight, may work on a air rifle not good enough for a M&P 15, you get what you pay for.

I have been very happy with this rear sight. The only reason i didn't give it 5 stars was the lack of an elevation knob.

Unbeatable for the price. VERY solid, looks exactly as the picture, and works as promised. What more is there?

Got this thing a day earlier than I paid shipping for! It is exactly as shown. Works like it is supposed to, looks like it is supposed to, and locked up tight on my DPMS. If you want a rear BUIS and don't want to pay the rip-off prices for a "premium" version, this is it. Let's face it, anything over $50 is a rip-off for a BUIS. 50+ year old technology that you can mount to a picatinny rail. Doesn't seem to justify the prices that other companies are charging these days.

This rear sight worked really well with the matching front sight. I zeroed in 6 bullets using both sights together. Great w/my BSA red dot. You can flip up sights and look easily through red dot window to see front sight post.

I purchased this after buying another more expensive brand (which was junk) and found this sight to be of much better quality. I am very pleased with it.

Kind of skeptic, but got to hand it to CTD, package arrived quickly. Upon opening package, I mounted the rear site and it was more than I expected. Fits solid and adjusted great. Excellent bang for the buck.

since there is not an elevation knob on it you can still a adjust the elevation with your front sight.

For the price, this rear sight is unbeatable. This works wonderfully as a co-witness setup with an EOTech. I had it zeroed in less than 10 shots. When the rear sight is locked in the upright position, there is absolutely no wobble. There is no knob to adjust the rear elevation, however, I knew that before my purchase and have it zeroed at ~200 meters. The windage knob clicks are crisp with no slack or play. It manages to hold a zero just fine. The flip-up 0-2 aperture permits firing in darker conditions. It also mounts very securely and tightly on my Stag-15 flat-top rail. This rear sight will definitely serve its purpose as a BUIS. The finish also matches that of my Stag. I shot a 239 out of 250 (with the "expert" qualification being a score of 220) on a USMC rifle range (not with this rear sight), so I understand the importance of rock-solid iron sights. Some may criticize this sight because of the low price and the origin of the manufacturer, however, it works exceptionally well!