Ok fellas. Buffer questions. I've built numerous ARs and always tuned them with an adjustable gas block and was good to go. I have a s&w m&p 10. I put a seekins adjustable gas block on it. So I could tune it to run with a can and not be over gassed. With the screw on the gas block backed all the way out. Allowing as much gas as possible. It still will not lock back on an empty mag. It will lock back when charging handle is pulled to rear. So it's not the mag. However it does eject to 3-4 o'clock. So I'm thinking a lighter buffer but, the factory buffer from s&w is a carbine buffer (2.95 oz) I'm afraid if I go much lighter it will beat its self to death. Should I try a lighter buffer or spring? Or is there another option.
