I mounted this to my M&P 15-22 without too many problems. The alen rench screw got stuck once but i was able to freeze it. The mounting rings sit too low on the rail, but still works fine (i just need to find a new set of rings or an extension for it) I was able to sight it the scope in no time, very easy to use and lots of fun. Good buy, i would recommend for some onelooking for a budget red dot.
Pros: zeros in nice and fast and stays accurate
Cons: the mount ring is not very tall
This review was written in the old system and had content requirements that are different than reviews written today.