Airsoft Canada - View Single Post - WA1911A1 wont blow-back

Mysteryfish · July 10th, 2006, 14:36

Or equally likely:

You have a bent valve stem.

Have you been using propane?

What type of magazine is it?

Are the valves on the magazines black?

If so, I had this problem ages ago, and the solution is to swap out your valves for aftermarket steel ones. There seems to be an imperceptible warping of the valve inside causing the hammer strike to only release gas to fire the BB, but not lock the Magna-type valve head under the spring loaded retainer (allowing a full gas cycle to happen).

I had custom valves turned for me by a friend, but you should be able to just buy aftermarket valves and have them work.

That is (of course) if it isn't the shrunken o-ring.

July 10th, 2006, 14:36	#5
Mysteryfish Trader rating Join Date: Mar 2004 Location: North Vancouver, B.C.	Or equally likely: You have a bent valve stem. Have you been using propane? What type of magazine is it? Are the valves on the magazines black? If so, I had this problem ages ago, and the solution is to swap out your valves for aftermarket steel ones. There seems to be an imperceptible warping of the valve inside causing the hammer strike to only release gas to fire the BB, but not lock the Magna-type valve head under the spring loaded retainer (allowing a full gas cycle to happen). I had custom valves turned for me by a friend, but you should be able to just buy aftermarket valves and have them work. That is (of course) if it isn't the shrunken o-ring.