Bought this as I needed to move my EOtech XPS2 to a custom AR platform CQB rifle DPMS custom built me as I have no reflex type sight sponsor it is on my own coin.. the EOtech was perfect for the 10in barreled DPMS custom.. so I wanted a cheap reflex sight for my built up Buck Mark .22 that I LOVE that gun is capable of .30 inch 5 shot groups at 40 yards if the trigger man does his part with Fed gold medal match rounds. Needless to say I did not expect much for 20 bucks... I was wrong with not expecting much.. this sight is NOT an EOtech however WOW for 20 bucks it not only impressed me it blew my mind that something 1/20th the cost of my EOtech is 85% as good (no I wouldn't trust my life to it as I do my EOtechs and it's no where near the quality) but shooting wise it's dang good I print just as good of groups with it as my EOtech at 40 yards being an average of .30 to .35 inch 5 shot groups that's the same as with the EOtech. The glass has more noticeable distortion then the EOtech but it's only mildly noticeable until you use a 3 or 4 power magnifier on it then it becomes very noticeable vs the EOtech.. I have no fired over 30 boxes so 1500+ rounds since I got it about 45 days ago.. it's rock solid and is working fine at that many rounds, the zero is dead on and haven't touched it since I zeroed it in about ten rounds.. so that's over 1500 rounds without having to touch the zero and I didn't use the zero locking screw.. I know I know it's only a .22, I have EOtechs on my two custom built 1911s one in .45 and one in .40 and they will stay as they are both my full size pistols that I C/carry some times but mostly use for race gun type shooting but when I do CC one of them I wouldn't trust my life to any other holo style sight other then EOtech, Leupold or Burris.. but I have also bought a 2nd one and put it on rock island 1911 .45 that is a light weight pistol and kicks like a tank with hot and heavy hand loads and it has held zero for 400 rounds without a hitch... This sight is rock solid reliable so far and for the money it's unbelievably good.. the size of it isn't that big but wouldn't make for a comfortable CC sight given the tiny EOtechs aren't super comfortable neither they are much more comfortable then these but these aren't really designed for that so can't take nothing away for that issue... My fav for CC right now is very tiny and almost flush mounting Leupold reflex sight mounted on a Les Baer full size 1911 .45 and on my Ed Brown 1911 .45 and I really like my Burris to but it's sitting on home defense 12ga. That's really off subject sorry bout that just kinda pointing things out.. this sight is performing as good as the high end sights are.. I shoot the buck Mark a lot and have spent a lot on Holo/reflex sight and wanted to see if the cheap units would be a total joke or are they real world decent and I'm pleased to say yes they are... For target shooting on a small pistol or large semi auto these sights are amazing for the cost I mean totally amazing! I cant trust my life to them using one on a CC weapon or a home defense weapon however they haven't given me a reason not to and I have put a lot of rounds down range in .22 and in a light weigh hard kicking .45 shooting hot and heavy hand loads and it's held up perfect without any zero holding issues on either gun and zero reliability issues. Right now the only issues I see with this sight Is if you are using a magnifier you will have image distortion and parallax issues, I know this as tested it with a DPMS in 5.56 before I put the second one on the .45 I put it on a heavy barreled target DPMS AR. With a 4x EOtech side flip magnifier the parallax correction is BAD, they did correct it decently and it's ok for shooting with no magnification but when you add 4x it becomes severe at anything closer then 150 yards and doesn't correct it's self completely until about 190 yards... Next issue at 4x is the mildly noticeable image distortion at no mag becomes pretty bad at 4x.. it won't be as noticeable with low end side flip magnifiers as they aren't super crisp and clear them selves but on a high end magnifier the distortion is really severe, enough so that it degrades the optics to the point of disbelief. However most people will not pair a 400 dollar magnifier with a 20.00 reflex sight, just letting you know just in case.. over all what you get for 20 bucks is mind blowingly great... It's amazing that this sight is as good, accurate, holds zero and is reliable as it is for 20 dollars.. this sight would likely serve as a great CC sight other then size.. I prefer reflex sights for CC a lot of people don't and won't use them for it , I however love them with a grip mounted pressure switch they are imho far better then anything else for CC.. this one lacks the grip switch and that kills it for CC but it is amazing for what it is and what it costs... Any budget weapons I need a reflex sight for that will not be a weapon that could mean life or death will wear one of these sights.. I'm buying 6 more right now..