An automatic grenade launcher or grenade machine gun is a grenade launcher that is capable of fully automatic fire, and is typically loaded with either an ammunition belt or magazine.

The Mk 19 grenade launcher (pronounced Mark 19) is an American 40 mm belt-fed automatic grenade launcher that was first developed during the Vietnam War.

The China Lake pump-action grenade launcher or NATIC is a pump-action grenade launcher that was developed by the Special Projects Division of the Naval Air Weapons Station China Lake, which provided equipment to United States Navy SEALs.

The QLZ-87 (also known as Type 87) is an air-cooled, gas operated 35×32mmSR automatic grenade launcher that is crew transportable with limited amounts of ammunition.