So I Just got a new KWA CQR Mod 1 and me and my friend took it all the way apart and put it back together. We've done this before with many other guns and we know what were doing but now when it shoots now it sounds like it's screaming. At first I thought it was the motor height but I adjusted that and it still sounds the same. Anybody have suggestions on what it might be? Any help is appreciated, thanks!