Product DescriptionThe Ballistic Advantage Performance Series 16" 5.56x45mm NATO BA Hanson Midlength barrel is built for reliable AR-15 performance with a corrosion-resistant Black QPQ finish and rugged 4150 Chrome Moly Vanadium steel construction. Designed around the BA Hanson profile, it features a midlength gas system and a low-profile configuration with a 1.03" gas block seat intended for .750" low-profile gas blocks. A Nickel Boron coated M4 feed ramp extension helps support smooth feeding and long-term durability in demanding use.Product Highlights Performance Series 16" 5.56x45mm NATO barrel for AR-15 builds and upgrades 4150 Chrome Moly Vanadium steel with Black QPQ corrosion-resistant finish BA Hanson midlength gas system design for balanced cycling and handling Nickel Boron coated M4 feed ramp extension for enhanced feeding durability Threaded muzzle (1/2"x28) and 1:7" twist for common 5.56 configurationsSpecs Brand: Ballistic Advantage Series/Model: Performance Series MPN: BABL556013F UPC: 819747020758 Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Type/Profile: BA Hanson Midlength, Lo Pro profile Material: 4150 Chrome Moly Vanadium steel Finish/Color: Black QPQ Bore Type: Rifled Twist Rate: 1:7" Muzzle Thread: 1/2"x28 Gas Block Seat: 1.03" seat; for .750" low-profile gas blocks Feed Ramps: Nickel Boron coated M4 feed ramp extension Firearm Fit: AR-15 Weight: 27 oz Sights: NoneDisclaimer: 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.