Wont lock back on empty magazine with overgassed upper

[titsonritz]

Recoil is sharper with a carbine weight buffer. I experimented with an upper equipped with an adjustable gas block, suppressed and unsuppressed, with carbine, H and H2 buffers. After all the internet chatter about using different buffer weights to control over gassing, I was surprised fo find out all three buffers used the same gas setting. The difference was how recoil felt. Recoil with the carbine buffer was uncomfortably sharp. You can feel the reciprocating mass hit the end of the RE harder.

Translating into unnecessary abuse on your weapon.