[L473ncy]

It's actually funny....

My M4 sometimes feeds all the BB's and at other times the last 3 or 4 won't feed (which is normal).

Maybe it could be related to me leaning over slightly and the bb's rolling or being pushed the rest of the way by the follower. (Will require more in depth research but it's the only thing I can come up with as to why it sometimes does that and other times the last few won't feed).