Double Bell Full Metal Hybrid Aluminium V2 GearboxThis is the latest hybrid Alloy V2 gearbox from Double Bell one of the oldest and most experienced airsoft manufacturer in history. This gearbox is amazing quality and can be installed into a lot of different gel blasters with the correct combo of t piece and the minor possible receiver mods. This is a direct replacement for any Double Bell rifle and has been put together perfectly for the highest possible performance. Features Wired to the rear 8mm