For airsoft players who got their own 3D Printers, here files are ready for you to download to help yourself build an Airsoft Pistol Grenade Launcher. André Vieira shows you his creation... "A 3D printed pistol 'grenade launcher' that uses 20mm airsoft shotgun gas shells. The two position picatinny mount and customizable trigger/release allows you to adapt the launcher to your replicas and personal preference."