G&P; M203 Quick Lock QD Grenade Launcher - ShortFull Metal ConstructionFits on all 20mm Accessory RailsCompatible with most standard 40mm Airsoft Grenade ShellsLMT Type QD Lever Lock SystemLength:380mmCompatibility:For Airsoft Guns with Standard 20mm Accessory RailsGrenade shells::Works with most Standard 40mm Airsoft Grenade Shells