G&G blowback "bb's fall out when mag is taken out"
 

Any idea how to fix this, Does it have to do with the plastic hop up? thanks

Happens with ALL AEGs. You always lose 3-5 BBs when removing the mag. Only one that this doesn't happen to is the P90 since it's fed from the top down and gravity feeds the last couple of BBs

Oic, Thougt it was the hopup. LOL thanks for the fasst response

There are some mags that have a long follower that will feed all but 1-2 BBs. With my King Arms mags, I usually only lose 1-2 BBs.

But it's a function of the mags, not the gun or hopup.