A Multiple Barrel Firearm is a firearm of any type with more than one barrel, usually to increase the rate of fire/hitting probability and to reduce barrel erosion/overheating. Originally a primitive attempt of rapid fire before the introduction of belt-feed/magazines and automatic weapons. It must be noted that Project SALVO revealed that any Multi Barrel Assault rifle/Machine Gun with a rifle caliber larger than 5.56 NATO and the possible exception of Pistol/Intermediate rounds (IE: 9x19mm, .30 Carbine, 7.62x39mm) is unsuitable for infantry use.