Which is a true statement about the M2HB's cooling and operation?

• A. Water cooled, gas operated
• B. Air cooled, gas operated
• C. Air cooled, recoil operated weapon
• D. Liquid cooled, recoil operated

Answer: (C)

The M2HB is an air-cooled, recoil-operated heavy machine gun. It relies on a heavy barrel whose heat is dissipated primarily by surrounding air rather than by circulating water, and it uses a recoil-driven cycling action where the barrel and bolt move together for a short distance after firing to unlock and cycle the mechanism. This combination—air cooling and recoil operation—fits the M2HB’s design, whereas water cooling or gas operation would describe different configurations or variants not characteristic of the standard M2HB.