Sig-Sauer Model 400, 5.56mm cal. semi-auto pistol. Serial #20J026061. New in box. The exciting little AR-15 style pistol with the forearm band that makes it BATF legal with its short 11.5" barrel and flash-hider. Black. MagPul tan/green furniture. Flat-top with carrier/adjustable rear sights. Also includes the pop-up rear sight to use right down on the top rail. One 5-rd. magazine. Cool little gun! Includes factory box, manual and paperwork. Short and handy with LOTS of firepower! Gunrunner West item.