I have one on my M4 for about a year now. I have shot several tactical matches and its holds zero and kicks ass. I replaced my Eotech for the Nikon. I like having the variable power and ease of adjusting the point of impact. I use mine from about 15-200yds with the spot on reticle. I crank the turrets alot during the shoots with no adverse effect. I find Im able to aquire the target fast with the dot reticle and I dont have to worry about batteries going dead.

NRA LIfe Member, Colt, Sig, Smith & Wesson, Springfield Armorer, NYBIN , NYPD Firearms Examiner, Serial Number Restoration, Cerakote, Gunkote, and Duracoat finishes