Stryke Airsoft & Paintball has the Echo 1 USA M203 Long BB Grenade Launcher at their spanking new site... "The ECHO1 M203 BB Grenade Launcher can fire most brands of BB shower grenade shells, including most Mad Bull brand shells. The launcher also comes with all the necessary equipment required to mount it on a Classic Army or Tokyo Marui M4/M16 type rifle. The body is constructed with ABS polymer and includes a metal barrel.

Be advised: Gas and BBs are sold separately."