[Yo-Yo]

On the civilian side, there was one, the Remington 700 EtronX hunting rifle. It used an electric impulse to set of the primer instead of a mechanical blow with a firing pin. They didn't catch on.

On the military side, there are two classes of guns that are electrically powered, the minigun and the chain gun. The minigun is the multi-barreled Gatling gun seen on aircraft, helicopters, and vehicles that fire the 5.56mm cartridge, the slightly larger version that fires the 7.62mm cartridge, and the even larger 20mm cartridge that is limited to fixed aircraft use, or anti-aircraft tracked vehicles.

The chain gun is a single barreled gun that most typically fires the 25mm round, and is seen on Bradley Fighting Vehicles and Apache attack helicopters.

[Dandy]

I think he was talking about a gun not a fire arm. Something that uses only electricity to expell the projectile.