WE PDW problem

[pappyjump]

Hey guys, i recently received a WE GBB pdw through a series of complex trades and i love it, but it has a major annoyance right now.

It will shoot 4 to 5 BBs perfectly, and then the fps drops off considerably, where some of the BBs will almost be rolling out of the barrel, even though the gun isn't running out of propane at all. It also starts shooting all over the place.
Im guessing that its a hop up bucking problem, opinions?

[Hutch]

I'd say take it in for repair, sorry I couldn't be of any other help...

[Jester316]

Lube it, the bolt might be sticking causing either low impact pressure or prolonged impacting.