Wiktionary
alt. A machine gun or autocannon that uses an external power source via a continuous loop of chain. n. A machine gun or autocannon that uses an external power source via a continuous loop of chain.
Wikipedia
A chain gun is a type of machine gun or autocannon that uses an external source of power to cycle the weapon rather than diverting energy from the cartridge, and does so via a continuous loop of chain similar to that used on a motorcycle or bicycle. "Chain gun" is a registered trademark of Orbital ATK for "externally-powered machine guns".
Usage examples of "chain gun".
She was vaguely aware of people coming up to the door of the shop and looking in, but then they'd see Rydell with the chain gun and go away, fast.
The muzzle of the 25-mm chain gun flashed three times, causing the TV screen to flare, and there was a line of the tracers, streaking to the hole&mdash.
Staring into a 30-millimeter Chain gun, two pods of thirty-eight 2.
The muzzle of the 25-mm chain gun flashed three times, causing the TV screen to flare, and there was a line of the tracers, streak.
The chain gun was a nice compromise between a machinegun and a cannon.
Besides, that twenty-five-millimeter chain gun makes for a nice equalizer.
The a 5-millimeter chain gun was wonderfully accurate, and the tracers allowed you to walk fire right into the target.
At the first hint of a blaster pointed in my direction, I'll chop her to pieces with the chain gun.
Each of them carried sixteen Hellfire missiles as well as a 30mm chain gun that also fired depleted uranium shells capable of shooting right through the top of any armored vehicle they encountered.
That gives me mini-rockets and a small chain gun, so I can cover their exit.
The airship is mounted with a 30-millimeter Chain gun, two pods of thirty-eight 2.