Ultra Force 40mm Grenade Launcher Pistol

A pistolized grenade launcher for just US$160 at eHobby Asia. This is a QD pistol grip which it is interchangeable with any AEG pistol grip, full metal, in black colour, and comes with a 20mm rail accessory on the top or below to attache a sight on top, and a grenade launcher below (did we say that? **teehee**). We wonder if it can also be attached below any AR/M16/M4 AEG too.