Heckler & Koch AG36
The AG36 is a single-shot 40 mm underbarrel grenade launcher that 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.