Description Nuprol Delta Complete V2 Gearbox with microswitch trigger, metal selector plate, 15 tooth steel piston and quick change spring system. Ready fitted with an M100 spring. The Nuprol Delta Complete V2 Gearboxes are an essential purchase for anyone looking to upgrade their airsoft rifle, or for gun techs seeking a high performance gearbox at a great price. A complete drop-in replacement for most airsoft M4 rifles.
