A2 Rear Sight - Picatinny Iron Sights with All Metal Construction - Two Aperture Sight for Close and Precision Targets - Designed to Mount on a Picatinny Rail

Super cool, went right on. Adjusts as you would expect. So far It is exactly what was needed

Great iron sight. Very solid and well made. Easy to set up and adjust.

Good quality, fast shipper, works well

I'm Old School, and always trained with Iron Sights on my Rifle or AR Pistol. I purchased this rear sight and the Matching Front sight for an AR Pistol and they work very well. After about 6 months worth of use on the range and in and out of the Truck, they are sturdy and hold the Zero. They also Co-Witness well with my EoTech Electronic Sight on another rifle.

Very nice and works great

This is a tough one for me. I returned my first one for being actually canted and purchased another one later, to roll the dice.For the money I haven't seen anything so far that will beat this. Unfortunately its $20 though, and there is only so much I can expect for $20 where single millimeters count.Starting with the good:- Solid construction. This will no doubt take a beating in most scenarios.- The aperture stays put and is FIRM, which was a major concern of mine. The tension clip below is excellent- Clicks on elevation and windage are positive and I have no obvious concerns with either mechanism in terms of holding zero- The aperture machining is not shoddy, the holes are precise and the "dish" is uniform- Mount tightens down well and it does not move although this is one of the cheaper areas on the sightThe bad:- Due to how it clamps down the whole unit is positioned slightly off center to the right. As this is a rifle sight, unfortunately, this forces me to adjust the windage all the way to the left. I haven't shot 100 yards yet, it might actually require a windage holdover if I tried to be accurate with this at that range, which is not ideal. If you are trying to use the peep sight as intended (physics wise) at significant range this might be a problem. At closer ranges this is not relevant for me with the two I've had. I believe this is a design defect (a cost-compromise is probably more apt) based on skimming other reviews and should be expected- On my second unit the windage knob is very tilted. This is because the hole drilled in either the screw itself or the knob is not exactly to spec and causes the whole knob to be tilted. However this does not affect how it works, it just looks dumb. I am able to press down on the knob to straighten it out because its under tension from both the aperture tensioner and a small spring that holds a ball detent in, but since the knob is pinned to the adjustment screw with a roll pin that causes the screw to move in unison ... which affects the zero. Because its under tension this isn't going to happen on its own but its still not ideal, and with other variances in manufacturing tolerances this could very well make for a aperture that moves when firing if the spring tension isn't great enough. If the holes were drilling in precise locations it wouldn't have to depend on any of that to stay in place.So it obviously isn't perfect and it won't be all that precise. But its $20. For $20 you are getting a solidly constructed AR 15 rear iron dual aperture sight that is clearly designed to fit on a standard AR15 top rail to use the least rail slots as possible which is nice. It is adjustable in both directions and its not a piece of junk in that regard. The tension on all the moving parts inspires confidence in me that it will hold zero. For that alone, and for casual iron sight use this will more than suffice. But here is the dilemma - good fixed iron sights where you can count on all these issues being correct cost a ridiculous amount of money. Anybody can look at one of those and realize how far they are bending you over a barrel for *machining something to tolerances you learn in freshmen metal shop class*. It's not hard. Its real work and non trivial, but its not $100+ worth of work (again, for fixed sights, quality fold up sights that check all the boxes is a different beast). Its a ripoff and its just another thing we're conditioned to expect because thats the way it is. Well I started looking around to see if the market responded for something just like this, a no nonsense version that is close enough. Sadly I do not think $20 to the end user through a reseller is going to be enough to manufacture what I want, after at least 2 layers of markup to make it at all profitable for the groups involved. I'd GLADLY spend twice this much for this EXACT unit that was machined to tighter tolerances. I have yet to find it.In conclusion this is a long winded way of saying its worth the money but the money aint enough to make it worth what its pretending to be. This will completely come down to how youre going to use it. If you want iron sights to complement optics that aren't a $55 piece of wobbly plastic that would snap off the gun if it fell off the bench wrong, this will fit the bill nicely. If you want the full capabilities of what this sight looks like it is, its probably not going to cut it at real ranges. Since thats how its being marketed I decided to give it 3 stars, despite the fact its also just $20.

This M4A3 (mod) rear sight is an exceptional value.Note: a little machining and fitting might be required. In my circumstance, I needed mill down the mounting screw approximately 2.1mm. This adjustment allowed me to torque to spec. Another observation is the windage detents are noticable and audible but not necessarily deep. If you're moving fast, you might miss the detent?Once installed, the sight and rifle were zeroed for 36 yards on a 25 yard range. Within 45 minutes, the rifle was shooting sub MOA. This unit is paired with a Troy Industries fixed front sight. This rear sight was installed on an AR15 platform. The sight holds up well to the AR15's moderate recoil.Note, this unit is painted not anodized. This observation was verified when painting the windage indicators. However, the paint is even and consistant.Yes. I would buy again for another build. Why pay more...?

You get what you pay for. Cheap, low quality rear sight. Although it is a close replica of the LMT M4 combat sight, cheap materials used and low quality of workmanship are easily noticeable. Alignment on the rail of the upper receiver is off. Good for use on airsoft guns or if you are only after the aesthetics of your rifle clone but do not want to spend a fortune.