This was pulled from a VFC Avalon MP5 AEG, and is brand new. The VFC avalon is renowned as one of the best gearboxes out of the box, and these parts make for a durable and high speed build (20-25rps when correctly installed)! A fully built gearbox without motor retails for $139, use this kit to build with your own gearbox and save yourself some money! Comes with everything shown. Mosfet is included, but should be assumed boneyard. Seller note: Set A