Hey, this is about my p90 again #-o . i went out back to fire my p90 just for fun when i noticed that on single, the bbs shoot out at like 10fps and go like 15 feet but occasionaly they will go out at the normal fps and distance. on full auto it does this but only with the first bb. when they dont go the normal fps i can hear a real plasticy *Fwick* sound. but when bbs go normal fps it makes the *thoomp* sound (if that explanation helps any). since im a narb with gear boxes and the like, what could be the problem?