[Boyso]

I own a WE M4 OB as well as 8 mags for it.

I've never gamed the gun, but fired at least 500 BBs so far without a single issue.

The mags however are really bad. Worse than any other GBB? I don't know.

I've had all my mags leak from the knocker valve as well as the "back plate".

Fixing knocker valves leaks is super easy, oil bath and just getting the orings back in their grooves.

Backplate are trickier, needs Gasket maker, and ALOT of it.