|
Get some oil in around the firing pin (the thing the hammer hits that then in turn hits the mag's valve) and between the hammer and firing pin, then dry fire it a dozen times to work the oil in. This happens a LOT in GBBs that aren't well maintained/new, I've had it happen a few times ot my guns, have had it happen in friends guns, and there have been at least a dozen cases on here where "the gas releases first shot". Everyone of them has been fixed with oil. If the problem is as mcguyver pointed out, that's one option, the other is oil.
Literally what is happening is the firing pin hits the valve, the slide starts to move but the firing pin sticks and doesn't retract, causing it to sit on the valve releasing all the gas.
|