WEIGHT: 6 lbs. 5 oz. (unloaded) - CALIBER: Chambered in .223/5.56 x 45 mm NATO - UPPER RECEIVER: CORE15® Mil-Spec Forged 7075-T6 M-4 Upper Receiver Type III Class II Hardcoat anodized finish M4 Feed Ramps (1913 Picatinny rail flat top) with dry lube internal finish and laser engraved T-markings - LOWER RECEIVER: CORE15® Mil-Spec Forged 7075- T6 Lower Receiver Type III Class II Hard-coat anodized finish beveled Magwell for improved reloading speed machined chevrons in front of magazine well bullet pictogram safety markings - BOLT CARRIER: CORE15® Mil-Spec Carpenter 158 Steel Bolt M16 Chrome Lined 8620 Steel Carrier Mil-Spec Staked Gas Key Tool Steel Extractor Shot Peened - CHARGING HANDLE: CORE15® Hardcore Billet Charging Handle V.1 - BUFFER TUBE: CORE15® Standard Mil-Spec - GAS TUBE: Gas Tube made of 304 grade Stainless Steel - GAS BLOCK: CORE15® Low Profile Gas Block - RAIL SYSTEM: CORE15® Keymod 15” Rail - BARREL: CORE15®16” Mid-length Profile 1:7 Twist 4150 Black Nitride Finish - FLASH HIDER: A-2 Flash Hider - GRIP: A-2 Pistol Grip - STOCK: CORE15® Six Position Retractable Stock (Mil-Spec) - TRIGGER GUARD: CORE15® Oversized Trigger Guard - MAGAZINE: PMAG 30rd Gen II