This magnifier works great at about 100 yards, possibly out to 200. The slide to side mount was not all it was cracked up to be, I replaced the mount after only a few rounds with a MAKO mount and it works like a champ. Very good magnifier for the money.
Pros: Good Value, Magnifier works great
Cons: Slide to side mount not solid, replaced
This review was written in the old system and had content requirements that are different than reviews written today.