The German Heckler & Koch UMP was designed to replace the aging HK MP5 series of submachine guns. The internal system is very similar to the G36. It comes in several calibers, 9mm, 40 S&W, 45 ACP. The integrated picitinny rail system allows for easy addition of grips, flashlights, lasers, optic sights, and suppressors. It is seen being used by Triela on the firing range fitted with a suppressor, optic sight, and foregrip.