Barrel: 18" 416R. Chambered in 6.5 Creedmoor, with a 1:8 twist, and a mid-length gas system. Barrel is finished off with a 15"Sabre Rail, and a Sabre Compensator muzzle device. Upper: Billet AR upper is hard coat anodized black for durability. Bolt Carrier Group: Sabre AR-10 BCG with Sprinco Gas Rings and OCK's Gas Key Fasteners Lower: Sabre-10 lower with black B5 Sop-Mod stock and grip. Black Anodized finish. Marked multi-caliber. Comes Standard with PSA Buffer Spring, Sabre 2-Stage DLC Trigger, and Anti-Walk Pins.