[Sim123456]

Hi guys, I was playing with my SCAR when suddenly all the gas vent out. I took a qui look inside and everything was normal but now it won't fire. I removed the lower receiver and put the mag in it to see what happens and it seem that the valve knocker doesn't hit the valve mag anymore. Not that it seem broken, but the valve knocker is hit slightly above the valve, no touching it. I mean that if the mag valve was a tad higher on the mag it would work. Any ideas? Thank you!