When I first received this in the mail I kinda went crazy and shot with no pellets (which was a stupid idea), which only led to jamming. The trigger and bolt jammed and needed to be taken apart, but luckily I only needed to loosen and tighten some screws to fix that which was probably only a freak accident that only occurs once. Other than that i've had no other problems and no jamming. This gun is very accurate like they say, and I use it with a 1x30 Piccatinny red dot sight by NcStar. This is the ideal gun for the beginner sniper.