SIG716 Patrol Gen2 7.62x51mm NATO 16 Inch Barrel Adjustable Flip-Up Sights Black Finish Telescoping Stock 20 Round. Gen 2 Patrol Rifle. Short-stroke pushrod operating system with four-position gas valve. Features an M1913 mil-std rail, free-floating barrel with 1:10 inch rifling, SIG aluminum forend and telescoping stock. Equipped with flip-up front and rear iron sights and ambidextrous magazine release. Built on an AR-style platform and chambered in 7.62x51mm NATO.