RAILWAY GUN

See also Railgun a weapons that propel projectiles using an electromagnetic field.

MAXIM GUN

An early, water-cooled, automatic machine gun having a single barrel.

CANNON

A large mounted weapon that fires heavy projectiles. Cannon include guns, howitzers, and mortars.

SHOTGUN
A smoothbore gun that fires shot over short ranges. Also called scattergun.

RIFLE
A firearm with a rifled bore, designed to be fired from the shoulder.