E. FIRING THE ROUND|
The breech is completely closed and the round is fired. Firing occurs after the breech is closed, by the action of the cam of the right inner crank upon the sear. The cam forces the sear inward, releasing the inner cocking lever and the firing pin. The firing pin strikes the primer, which explodes the propellant charge of the round.
F. EJECTING THE CASE
The barrel assembly, breech mechanism, and tray are moving rearward as a result of the momentum imparted by the powder pressure at the beginning of recoil. The breech block is in the open position, the outer and inner cranks having been rotated by action of the roller, riding against the cam surface of the side door. The firing pin is cocked by action of the cam of the left inner crank depressing the outer cocking lever. As the breech block descended, it struck the toes of the extractors, ejecting the empty case. The feed pawls, due to the action of the tray guides, are rising in order to feed the next round onto the tray.
A complete cycle has now taken place, and the action repeats itself in automatic fire as long as the loader is supplied with ammunition and the trigger mechanism is held in the firing position.