Well D2806 M4 Electric Airsoft Gun Collapsible Stock Fps-250 Full Auto (Airsoft Gun) Features: True 1:1 Scale, Looks and Feels like the US Army's M4 Rifle Electric Powered (AEG) Velocity (FPS): 250 Fully Automatic Top and Bottom RIS Top Fed BB Loading Scope Upgraded Version w/ Battery Contact in Magazine Retractable Stock Length: 32"