The AG36 is a single-shot 40 mm grenade launcher which operates on the High-Low System and was designed primarily for installation on the G36 assault rifle, designed by the German weapons manufacturing company Heckler & Koch of Oberndorf am Neckar. It originally appeared as Heckler & Koch's candidate for the US Army's Enhanced Grenade Launcher requirement, evaluated for use with the XM8 and FN SCAR rifles.
The AG36 is a single-shot weapon with a break-action steel barrel and unlike its American counterpart, the M203, the AG36 swings out laterally for loading, allowing for the use of longer rounds when necessary, e.g. baton or flare rounds. When open, the breech is on the left. For installation the rifle's existing barrel handguard is removed and replaced by the AG36. The weapon has a trigger group with a manual safety lever and a pistol grip for ease of handling. Aiming is accomplished using standard ladder sights, which are located on the left side of the launcher body and folded down when not in use. Due to its modular design, the launcher can be readily adapted to other rifles such as the M16-series and the Diemaco C7 and C8.
In Project Reality, the AG36 is the grenade launcher of the German Bundeswehr and Dutch Forces. It can fire high explosive, smoke, or flare rounds.