I apologize if this has already been asked a million times.
I recently bought a KWA CQR Mod 2, all the internals are stock with the exception of a Madbull tightbore barrel. I just bought an Aimpoint and attempted to zero the gun in my backyard. At 50' I'm shooting a 5"-10" group very inconsistently on the target. I also watched the BB's when shooting over my fence and sometimes they go straight consistently 1-2 times, and then other times they'll shoot out sideways. What could I start to check/upgrade to tighten my group up? I'm fairly new but before I got into the sport I borrowed my friend's TM M4 with a red dot and that could shoot lemons hanging in the backyard every time - it had a longer barrel but from my understanding that only helps raise the FPS and maybe some slight accuracy?
I'm using Classic Army .25s too.
Thanks for any help and advice!