This is the famous M203 Military Type Grenade Launcher. It is the exact replica of the RIS mounted version used by the elite forces through out the world. The M203 Military Type Grenade launcher package comes with everything you need to mount on any paintball gun. This Universal RIS M203 Military Grenade Launcher Package is compatible with all paintball marker. It is quick and easy to install. Key features: - Heavy duty M203 Military type grenade launcher - Compatible with all barrels - Compatible with all grenade cartridges - Mounts directly on the barrel The package comes with 2 x 20mm barrel rail that can attach the M203 to any paintball gun, markers and Airsoft rifles. More information on Grenade Launcher and Ammo,and view video demo,pls visit: http://rap4.com/paintball/os/m203-military-grenade-launcher-package-apex-barrel-p-3557.html