JG M4A1 help?

Question

my hopup unit isnt working and bbs just roll out the barrel ..i played the other day and it got really muddy what should i do?

Answer 1

ok here is your prob, or at least a list of things to check. your mag may not be feeding well, your o-ring has no lube thus resulting in no compression, your hopup bucking is muddy, and a lot of other things, just check those,  also you may have a crack in your cylider or even worse, piston!! check, and get back to me and i'll help you out bud. o and if the hop up wheel dont turn thats a whole nother issue, try  that, bc if not, tell me and i'll reccomend you the right parts:) dont wory, i got your back, i always help a fellow airsofter in need

Answer 2

it may sound weird but try firing the gun upsidedown