Which option completes the pairing PKM System of Operation?

Which option completes the pairing PKM System of Operation?

• A. Rotating Bolt
• B. 7.62x54mm rimmed
• C. PKM Locking system
• D. Gas Blast, auto only

Answer: (D)

System of Operation refers to how the firearm uses expanding gases to cycle the action. The PKM is a gas-operated, belt-fed machine gun that uses the pressure from the fired cartridge to drive a piston and cycle the bolt, ejecting a spent case and chambering a new round in one continuous cycle. This action is automatic only, meaning it’ll continue firing as long as the trigger is held and ammunition is available. That combination—gas operation driven by a gas blast and automatic fire—is exactly what describes the PKM’s method of cycling. The other options point to locking mechanisms or the cartridge, not how the weapon actually operates in use.

System of Operation refers to how the firearm uses expanding gases to cycle the action. The PKM is a gas-operated, belt-fed machine gun that uses the pressure from the fired cartridge to drive a piston and cycle the bolt, ejecting a spent case and chambering a new round in one continuous cycle. This action is automatic only, meaning it’ll continue firing as long as the trigger is held and ammunition is available. That combination—gas operation driven by a gas blast and automatic fire—is exactly what describes the PKM’s method of cycling. The other options point to locking mechanisms or the cartridge, not how the weapon actually operates in use.