What is the system of operation of the Benelli M4 Super 90?

What is the system of operation of the Benelli M4 Super 90?

• A. 12 gauge
• B. 50M
• C. Gas tappet
• D. Semiautomatic

Answer: (B)

The key idea is how the action is powered to cycle after each shot. The Benelli M4 Super 90 uses a gas-operated, auto-regulating system (often called ARGO). After the shot is fired, a portion of the high-pressure gas is directed to drive a short-stroke piston that unlocks and drives the bolt rearward to eject, then chambers a new round and resets the action. The “auto-regulating” part means the system adjusts the amount of gas used for cycling so performance stays consistent with different shell types and temperatures. This is what makes it a true gas-operated action. The firing mode is semiautomatic (one round per trigger pull), but that describes how you fire, not how the action cycles. The other options refer to size or range, or to a different, less precise term for the cycling method, rather than naming the actual operating mechanism.

The key idea is how the action is powered to cycle after each shot. The Benelli M4 Super 90 uses a gas-operated, auto-regulating system (often called ARGO). After the shot is fired, a portion of the high-pressure gas is directed to drive a short-stroke piston that unlocks and drives the bolt rearward to eject, then chambers a new round and resets the action. The “auto-regulating” part means the system adjusts the amount of gas used for cycling so performance stays consistent with different shell types and temperatures. This is what makes it a true gas-operated action. The firing mode is semiautomatic (one round per trigger pull), but that describes how you fire, not how the action cycles. The other options refer to size or range, or to a different, less precise term for the cycling method, rather than naming the actual operating mechanism.