| | A large, fully automatic weapon capable of delivering sustained fire, usually mounted on vehicles or tripods. It fires larger rounds than light machine guns and is designed for long-range, high-volume fire. |
| | A portable, fully automatic firearm designed for rapid fire, often used by infantry squads for suppressive fire. It is lighter than heavy machine guns but still capable of sustained bursts. |
| | A versatile, fully automatic weapon that can be used in multiple roles, from light support to vehicle-mounted operations. It usually fires rifle-caliber rounds and can be used in both offensive and defensive actions. |
| | An early type of machine gun, such as the Gatling gun, which uses a hand crank to operate the firing mechanism. These guns were the precursors to modern automatic firearms. |