Hey man, Try moveing that plate.
Alot of people have been geting issues with that not closeing off all the air. Also some thing to add this guy was geting way bad FPS like 180 with .2's.
Get more fps if your guns haveing that issue.
Also if we end up like what we hear from you. Me and 2 other of my frinds are geting Mp40's. I might get a Shoei Mp44 also.