Hey while we're on the topic of the valve there... I'm having some issues fixing mine.
I have a weird problem where whenever the gas tank is inserted into the stock, ALL the gas goes out the front of the gas cylinder.
The weird thing is that if I were to disassemble it so that it's just the cylinder and blow into where the stock attaches the receiver, the thing doesn't leak. I can't blow air into it so I KNOW it's airtight before inserting gas. I suspect it's because the o-ring is too soft and is flexing when the propane is inserted.
The problem now is that no matter where i switch the o-rings and what I do with the front and rear valve it still shoots out all the gas without stopping. I've even removed the "firing pin" to try and isolate the problem.
I hate to be a bother but could someone please post some reassembly pictures without the cylinder on? I'm stumped on this one.