Personal Defense Weapon (PDW) Series from Knight's Armament Company (KAC) Thanks VFC to produce replica of Electric Powered AEG Full Aluminium & Steel Construction Proceed by CNC Machining, Die-casting & Lose Wax VFC's unique Patent Design such as Bolt Catching System, realistic field stripping & Ambidextrous safety & magazine catch with Lightweight Finishing make this weapon just like a real steel Built with VFC's Gearbox Structure - 8mm enhanced precision gearbox with professional steel bushings, steel gears, Durable Polymer Carbon piston which material is also the same as the Glock pistol frame and ball bearing spring guide. It is strictly tested by the 12 volt Car Battery and suit for the Li-Poly battery. The instant you pull the trigger, you will feel the amazing explosive force.