Which system describes Recoil, semi-auto, SA?

Which system describes Recoil, semi-auto, SA?

• A. M17/M18 System of Operation
• B. MG3 System of Operation
• C. M17/M18 Applied Safety
• D. 7.62 x 51mm

Answer: (A)

The main idea is understanding how a firearm cycles after each shot. Recoil-operated, semi-automatic pistols use the energy of the fired round to move the slide and barrel briefly, unlock them, eject the spent case, and chamber a new round, all in one continuous cycle. The M17/M18 pistols are built around this recoil-operated, semi-automatic action, so describing their system of operation directly matches Recoil, semi-auto, SA. The other options don’t fit the same way. The MG3 is a machine gun with its own operation suited to automatic fire, not the specific pistol recoil cycle described here. 7.62 x 51mm is a cartridge size, not a description of how the weapon operates. M17/M18 Applied Safety concerns safety features rather than the way the gun cycles.

The main idea is understanding how a firearm cycles after each shot. Recoil-operated, semi-automatic pistols use the energy of the fired round to move the slide and barrel briefly, unlock them, eject the spent case, and chamber a new round, all in one continuous cycle. The M17/M18 pistols are built around this recoil-operated, semi-automatic action, so describing their system of operation directly matches Recoil, semi-auto, SA.

The other options don’t fit the same way. The MG3 is a machine gun with its own operation suited to automatic fire, not the specific pistol recoil cycle described here. 7.62 x 51mm is a cartridge size, not a description of how the weapon operates. M17/M18 Applied Safety concerns safety features rather than the way the gun cycles.