The SIG516 Patrol (300 Blackout) comes with a Magpul MOE stock, MOE pistol grip and a AK style mag. As with all SIG516 Patrol rifles, the SIG516 Patrol 300 Blackout uses the SIG SAUER innovative short-stroke gas pushrod operating system, which reduces chamber debris and allows the rifle to run cleaner and cooler. The SIG516 Patrol 300 Blackout ships with a 30 rd 7.62x39 AR type mag. A 16" chrome-lined barrel is chambered in 7.62 X 39 and is surrounded by a free-floating M1913 quad rail. The top rail is optic-ready and includes SIG SAUER flip-up iron sights.