Gas or recoil operates the action.
automatic rifles work by the exerting gas made from the bullet and the gas pushes back the bolt loading a new round in
the gas pressure from the exploding shell ejects the empty casing and activates the reload mecanism
Yes
Yes
Embellishment
Yes
Yes
Browning Automatic Rilfe
Generally Yes.
Semi automatic
Fully automatic shotgun, no. Automatic rifles and machine guns, yes.
Just fine.