To be classified as a rifle under U.S. federal regulations a firearm must have a barrel length of at least 16 inches. Therefore the BM-15 with a 16 inch barrel is ideal for rifle shooters. The 16-inch barrel length provides higher bullet velocity than shorter barrels and offers ample rail space for accessories. Customers find this size to be excellent for accurate longer-distance shooting making it well-suited for competitions and range use while ensuring maximum control. – Materials – 7075-T6 Aluminum Forgings – Cerakote Finish – 4150 Chrome-Moly Vanadium Nitride Barrel (1:7 Twist) – Features – 5.56x45MM NATO – AR-15 Platform – Mil-Spec Trigger – A2 Pistol Grip – M-LOK Free Float Rail – 6-Position Adjustable stock – Ambidextrious Charging handle – Ambidextrious Safety selector – Operating System Direct gas impingement system