(under the class definition) A gun comprising means to project a projectile and employing an explodable propellant which produces a pressurized gas upon detonation thereof and having (1) a barrel means through which the projectile may be propelled to be ejected through an opening therein by the force of the gas, and (2) means to substantially neutralize, with respect to the gun, those propellant gas reaction forces which are developed and which act counter to the gas forces which act in a direction to propel the projectile.
