Product DescriptionThe Ballistic Advantage Modern Series 16-inch 5.56x45mm NATO M4-profile barrel is built for AR-15 platforms that demand dependable performance and long service life. Machined from 4150 Chrome Moly Vanadium (CMV) steel and treated with a black QPQ (salt-bath nitride) finish for enhanced corrosion resistance, this barrel features a carbine-length gas system and a .750-inch gas block journal for broad compatibility with common AR-15 components. A QPQ-coated M4 feed ramp extension supports reliable feeding, while standard muzzle threading makes it easy to pair with many popular muzzle devices.Product Highlights Modern Series 16" M4-profile AR-15 barrel chambered in 5.56x45mm NATO (also accepts .223 Remington) 4150 Chrome Moly Vanadium steel construction for strength and durability Black QPQ (salt-bath nitride) finish for corrosion resistance and reduced wear Carbine-length gas system with a .750" gas block journal for common AR-15 builds Threaded muzzle (1/2x28) with 1:7 twist rate for versatile projectile stabilizationSpecs Brand Name: Ballistic Adv Series/Model: Modern Series / M4 Profile Carbine Length Caliber/Chamber: 5.56x45mm NATO (accepts .223 Remington) Barrel Length: 16" Gas System Length: Carbine Barrel Material: 4150 Chrome Moly Vanadium Steel Finish: Black QPQ (salt-bath nitride) Twist Rate: 1:7 Gas Block Journal: 0.750" Muzzle Threads: 1/2x28 Feed Ramps: M4 (QPQ coated extension) MPN: BABL556014M UPC: 819747020109Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.