Springfield Armory Saint AR-15 Flip Up Front 5.56mm NATO 16in Black Semi Automatic Modern Sporting Rifle - 30+1 Rounds - The SAINT's flat top design is optics ready and includes a flip-up rear aperture sight and fixed A2-style front. The 16-inch Chrome Moly Vanadium barrel features a 1: 8 twist rate to handle a wide range of bullet types. The operation of the M16 bolt carrier group is managed by a mid-length gas system paired with a heavy tungsten buffer, resulting in an exceptionally smooth action. A good shot starts with the trigger, so that's why the SAINT AR-15 features micro-polished and Nickel Boron treated components. While it offers the right pull weight for defensive use, you won't feel it. Forged Type III Hard Coat Anodized Aircraft Grade 7075 T6 Aluminum Receivers Chrome Moly Vanadium Barrel GI Type Birdcage Compensator Nickel Boron Coated GI Single Stage Trigger Bravo Company Trigger Guard BCM Gunfighter Polymer M-LOK Handguard Carbine "H" Heavy Tungsten Buffer GI Style Charging Handle M16 BCG With Carpenter 158 Steel Bolt One 30-Round Magpul PMAG