A battle rifle is a rifle firing a full-sized rifle cartridge, such as .303 British, .30-06 Springfield, 7.62x54mmR, or 7.62x51mm NATO, from a full-length barrel. Battle rifles are usually semi-automatic; however, some have select-fire capability. Almost all battle rifles have a long barrel and fire a large caliber rifle round. Like assault rifles, they often have carbine variants as well.