I don't understand how air leaks up the feedneck. There could be blow back from the feedneck cause the air is channeled well with the stock bolt, but that wouldn't explain it stopping after one shot.
You are supposed to lube the ram and the regulator regularly.
For 360 you can get one that has ups to it as well. I would not pay 360 shipped, 300 at most.
Clothing is all that remains. All my gear, gone.