[fyra]

Thanks for the added info RM.

Also, has anyone had problems with Guarder HFV's? 2 of mine just "blew out".

When I gassed up the magazines, the moving portion of the valve just shot out the back of the magazine, releasing all the gas.

I guess the O-ring at the end of it is too small... but is just seems weird.

Edit:
Might have fixed it with the O-ring from the stock valve. Time will tell.

Edit2:
Swapping the rearmost O-ring with the one from the stock valve does indeed seem to fix the issue. The stock O-ring is a bit larger and considerably harder.

Maybe an easy fix to a nasty problem.