Shotgun Simulator, Dummy Launcher

VFC Colt XM148 Grenade Launcher - eHobbyAsia

VFC - Colt XM148 AIRSOFT 40mm Grenade Launcher

How useful and/or effective is an underbarrel grenade launcher? And does it make the gun harder to shoot and handle? - Quora

Gundog Training - Why I bought a remote dummy launcher

Shotgun Simulator, Dummy Launcher

6mmProShop Airsoft Pocket Cannon Grenade Launcher Pistol (Package: Launcher Only), Airsoft Guns, Gas Airsoft Pistols - Airsoft Superstore

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Shotgun Simulator, Dummy Launcher

LCS Wooden Shotgun for Hunt Tests