S&W sigma 40f co2 GBB problem

Beez

This pistol no longer fires properly,

at first you would cock it and it would fire fine but the blowback did not go back far enough to cock itself again. Now it does not blowback at all and makes a tiny noise, fires a bb but barely.

I have cleaned it with silicone oil etc and all internal parts look fine. Also sprayed silicon oil on mag valve.

Anyone have any idea what wrong? Could it be the mag not feeding it enough gas? I have obviously used fresh co2 capsules.

jezu1

Could it be the mag not feeding it enough gas, yes could be , try different mag, i had similar proplem years ago, posibly valve needs a little work (tide up or untide up)

citizenken

I have one of these and I wasn't happy with the performance , so I took it apart and lo and behold the hop was reversed , with the result that the more I turned the hop screw the more the inner barrel was pushed off it's true trajectory.so I basically put it back together correctly.It's fine now and is a litle beast.:)

Beez

I was messing with it last night and found when i push the mag up into the gun it fires fine. Looked at mag where is clips in and its warn down so seems to be a faulty clip alright.

Thanks for the replys