heavy machine gun

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heavy machine gun

[′hev·ē mə′shēn ‚gən]
(ordnance)
Any machine gun of relatively heavy weight, including caliber-.30 water-cooled machine guns and caliber-.50 machine guns.
Any aircraft machine gun above caliber .30.
References in periodicals archive ?
In total, the SMM heard at least 85 undetermined explosions, 25 impacts from automatic grenade launchers, and numerous bursts from heavy machine-guns and small arms at points ranging from less than 1km to 10km in all directions from positions along this line.