Just a thought. It could be the Madbull barrel if the teflon coating inside has worn out and is starting to flake off. And no the barrel being short won't affect anything unless there's something wrong with the flash hider or whatever like it isn't perfectly straight screwing up the trajectory (ie. if a BB bounces around the inside of a suppressor).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE