CORE15 Mil-Spec Forged 7075-T6 Upper and Lower Receiver, Type III Class II Hard-coat anodized finish, beveled Magwell for improved reloading speed, machined chevrons in front strap, bullet pictogram safety markings. 16 4150 Chrome Moly M4 Profile Chrome Lined Barrel 1:7 Twist. Chambered in .223/5.56 x 45 mm NATO. Featuring Direct Gas Impingement Gas System, Gas Tube made of 304 grade Stainless Steel, Chrome lined Steel Bolt Carrier and Bolt Carrier Key, Magnetic Particle Inspected (MPI) Bolt Assembly, and an A-2 Flash Hider.
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