The 614 line of airsoft AEGs from Echo 1 Airsoft Guns are a variant of the M4 carbine that have integrated tactical features. Noticeable differences have been made to the upper receiver including the integration of a rail system that makes attaching airsoft accessories to any of the four sites of the barrel assembly. A front flip-up sight comes standard with an adjustable rear site. Features a working retractable LE stock, functional charge handle and 300 round high capacity magazines. Rated to shoot at over 400 fps and marked as accurate up to 120 feet.