I bought a Crosman Pulse R73 aeg for my first airsoft gun and I used it for about a week and was very pleased

, but the next time i tried to use it the bbs didn't fire but just rolled out of the barrel when i tilted it. I took it all apart cleaned the barrel and put it back together, charged the battery and it still does the same thing :banghead: Please help me figure out whats wrong. The gun seens to be working fine, all the internal parts seem to be moving