High Quality Content by WIKIPEDIA articles! An assault rifle is a selective fire rifle or carbine typically firing ammunition with muzzle energies and sizes intermediate between those of handgun and more traditional high-powered rifle ammunition. Assault rifles are categorized between light machine guns, intended more for sustained automatic fire in a support role, and submachine guns, which fire a handgun cartridge rather than a rifle cartridge. Assault rifles are the standard small arms in most modern armed forces, having largely replaced or supplemented larger, more powerful rifles, such as the World War II-era M1 Garand and Tokarev SVT. Belt-fed weapons or rifles with very limited capacity fixed magazines are generally not considered assault rifles.