M4 Wierd Problem,
 

Hi Guys, my friends G&G M4 seems to be acting funny, when he shoots, it shoots fine but when it he stops, a BB falls out of his barrel, i'd search on the forums but i don't really know what im looking for or what it would be called.

My cousin, our friend and I got our guns the same day and we were letting our other friend shoot our gun, and we were using the same mag in each of the guns, so it can't be the mag that is causing the problem.

Can anyone help me with this?

turn your hopup on a little, this happens if your hopup is completely off.

ok thanks alot, ill let him know and post the results