This FN AR-15 barrel is a 16-inch M16 (government) profile designed for mid-length gas systems and chambered for 5.56x45mm NATO (.223 Rem). Manufactured from Chrome Moly Vanadium per MIL-B-11595E, the barrel is button rifled and finished in matte black manganese phosphate. It features a chrome-lined bore and chamber, M4-style feed ramps, hydraulic and magnetic inspections, and a 1:7 right-hand twist rate for stability with a wide range of projectiles.
Key Specifications
- The caliber is 5.56x45mm NATO / .223 Remington.
- The overall barrel length is 16 inches.
- The barrel profile is M16 (government) profile.
- The gas system is mid-length.
- The rifling is button rifled.
- The bore and chamber are chrome lined.
- The rate of twist is 1 in 7 inches, right-hand.
- The exterior finish is matte black manganese phosphate.
- The muzzle thread pattern is 1/2×28.
- The material is Chrome Moly Vanadium per MIL-B-11595E.
Built and inspected to military-derived standards with High Pressure Testing (HPT) and Magnetic Particle Inspection (MPI), this barrel is engineered to provide consistent performance and extended service life for range, duty-style, and precision-oriented AR-15 builds. Its combination of chrome lining, M4 feed ramps, and a common 1:7 twist makes it a dependable option for users seeking a durable, service-profile mid-length barrel that integrates easily into standard AR platforms.
