RedWolf Airsoft is offering that they can modify this Star AG36 Grenade Launcher for the WE G39C (G36C) Gas Blowback Rifle... "This grenade launcher is designed for Marui G36C , durable fibre body and aluminium barrel. Full metal adjustable sights on the side of it.Can use Mosquito Molds, MOSCART, King Arms, or ANGS shells to pump out anywhere between 18 and 165 BBs in one shot using gas-charged shells. Length = 383mm, Weight = 1800g."