Pre-upgraded to shoot around 360~420 fps with fully reinforced JG / Echo1 internal for the quality you can expect.

 

JG Factory standard high performance motor included.

Wiring and fuse included.

 

If you have a Classic Army or Tokyo Marui AUG, this is the fastest way to upgrade your AUG to shoot at reliable high power. It is also a great spare gearbox / replacement parts because of the pricing. If you are looking to purchase 2~3 internal parts, sometimes its more affordable to purchase the entire gearbox since all the extra parts you don't need you'll eventually need as all gearbox parts are wear and tear parts.

 

Everything in the image and inside the gearbox are included. (Gearset, bushing, wiring switch assembly, fuse box with fuse, tamiya adapter, motor, motor housing, piston, piston head, cylinder, cylidner head, reversal latch, nozzle, spring.....)