Have a blast with the DBoys M203 Airsoft Grenade Launcher and 40mm Shell. Fill the shell with green gas and BBs, load the shell into the launcher and fire a 24-round blast to clear rooms and groups of players at once. The M203 Airsoft Grenade Launcher is full metal with a comfortable ribbed polymer hand guard. It can be mounted on M4 and M16 style airsoft guns that are wired to the rear via a quick-detach clamp. To mount simply remove the lower hand guards from the rifle and slide the launcher over the barrel and secure with the QD clamp. For M4/M16 guns with Rail Accessory System (RAS) hand guards, a adapter is included as well and can be installed directly onto 20mm rails as well. This set features the long barreled version of the grenade launcher that measures approximately 15" and looks best for full length M4/M16 airsoft guns.