I have one on my Compass Lake Engineering AR15 competition upper. I have never mounted a scope on it to check group accuracy or potiential but using the iron sights I can keep 5 shots at 100 yds right at an inch. It seems to clean up fairly easily and I have had no problems with it although I am still under 1000 rounds down the barrel. Not much information but I hope it helps.
Posts: 452 | Location: Wyoming | Registered: 15 November 2002