desert magnum 2018b electric blowback airsoft pistol full & semi automatic aep fps-180 w/ realistic blowback action, integrated hop up(Airsoft Gun) Features: Blowback Mechanism for a More Realistic Feel! Velocity (FPS): 180 with 0.12g BB's Integrated Hop Up System Electric Powered (AEP) Can Switch Between Full Auto and Semi Auto! Removable Magazine, Use High Quality Seamless BB's to Avoid Misfires and Jams Requires 4 AAA Batteries to run (not included) Approx. Length: 8"