The Elite Force VFC AVALON Calibur II PDW AEG is a premium product for discerning airsofters. Typical of the PDW platform, the Caliber II features a very short barrel and has an overall length of only 19.25" with the reinforced wire stock collapsed. The Caliber II PDW includes one QRS black midcap magazine and will accept most standard M4 style magazines. This PDW also features a full metal body and reciever, flip-up iron sights, reinforced PDW stock, ECS gearbox, 14mm left hand threaded metal outer barrel, custom flash hider, ambi-mag release, ambi-selector, adjustable rotary hop-up chamber, red steek tooth upgraded piston. MOSFET installed-- Must use 11.1v LiPo battery, not included.