there is alot of build up in my battlecomp, i can get most of it out but some small clumps always stay on the side. i tried taking it off to get to the mess but every time i put enough force to maybe unscrew it, i see the barrel flex a little and it freaks me out so i stop. anyway, my question is........is okay to leave the little bit of build up that just wont come out? will it effect accuracy? anything else? thank you. Wanna kill these ads? We can help!