The RS-PK AEG is a full metal airsoft gun that features offical Red Jacket Firearms trademarks. It is an AK style AEG and is fully compatible AK magazines. The entire gun is fully made of metal except for the butt-stock and handguard which are made of a durable ABS plastic. The finish on the gun is a matte black which gives the gun a sleek and tactical appearance. Both front and rear AK-Style sights are fully adjustable for precision shooting. Internally the gun is very solid, featuring a full metal 7mm bearing V3 gearbox and steel gear set. It also has a full metal hop-up unit which is more durable and has greater longevity than a standard plastic hop up. The battery compartment is inside the stock. This AEG has a mini-type connector and can use 8.4v or 9.6v NiMH batteries. We recommend a 9.6v 1600 mAh battery for the best performance.