Ok. I've hit a wall here. My M&P 15-22 is failing every other round.
It's not:
Dirty
Mags
Firing pin
Feed lips
Extractor
Ammo
Trigger
This gun has 48,000 rounds through it, it's a very simple design. I'm out of ideas. Replaced firing pin.
When it fails, I can open it up and see that the hammer is full forward. If I pull the bolt back it extracts the round. If I place the same round back in the breach, manually reset the hammer and close it back up, it fires. So it's something with the semi-auto function that is failing. I can manually feed it all day long.
Bolt return spring??? Could that be weak maybe?
Any ideas are greatly appreciated.
It's not:
Dirty
Mags
Firing pin
Feed lips
Extractor
Ammo
Trigger
This gun has 48,000 rounds through it, it's a very simple design. I'm out of ideas. Replaced firing pin.
When it fails, I can open it up and see that the hammer is full forward. If I pull the bolt back it extracts the round. If I place the same round back in the breach, manually reset the hammer and close it back up, it fires. So it's something with the semi-auto function that is failing. I can manually feed it all day long.
Bolt return spring??? Could that be weak maybe?
Any ideas are greatly appreciated.