The SIG MCX Rattler was designed from the ground up to be as discrete as possible while retaining all the robust capabilities of the MCX. It features a 5.5″ PDW barrel and folding pivoting contour for stability and easy concealment. Free-floating M-LOK handguards matched with a PDW upper and barrel, the MCX Rattler PCB is the ideal choice for fast-moving operators. Comes with one 30RD magazine.