Product DescriptionThe FN AR-15 Cold Hammer Forged (CHF) barrel is built for hard use, using the same proprietary Chrome Moly Vanadium steel associated with FN machine gun barrel production. Each barrel is magnetic particle tested for consistency and quality, then finished with a corrosion-resistant matte black manganese phosphate. A chrome-lined bore and chamber help resist corrosion and heat erosion for long barrel life and reliable chambering and extraction, while the M4-style feed ramps and barrel extension promote consistent feeding.Product Highlights 16-inch M4 profile AR-15 barrel chambered in 5.56x45mm NATO Cold hammer forged construction using Chrome Moly Vanadium steel for durability Chrome-lined bore and chamber for corrosion resistance and improved barrel life Carbine-length gas system design with M4 feed ramps for reliable cycling and feeding Matte black manganese phosphate finish helps resist external corrosion and oxidationSpecs Brand: FN Model / Firearm Fit: AR-15 Caliber: 5.56x45mm NATO Barrel Length: 16 in Profile: M4 Gas System Length: Carbine Construction: Cold Hammer Forged (CHF) Material: Chrome Moly Vanadium Steel Bore/Chamber: Chrome lined Feed Ramps: M4-style feed ramps and barrel extension Finish: Manganese phosphate / black phosphate (matte black) Muzzle: Threaded Twist Rate: 1:7 Testing: Magnetic Particle tested Weight: 2.02 lb UPC: 845737008376 Manufacturer Part Number: 20100047Disclaimer: 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.