The Faxon Firearms AR-15 pinned gas block 5.56x45 NATO rifle barrel delivers a reliable, ready-to-build foundation for a mid-length AR-15 platform, featuring a 16" government-contour barrel finished in black nitride for enhanced durability and corrosion resistance. This pinned gas block design pairs with a mid-length gas system to optimize balance and reliability across a variety of 5.56x45mm NATO configurations, while the 1-8 twist rate stabilizes a broad range of common projectile weights. A standard 1/2-28 muzzle thread pattern accommodates common muzzle devices, giving shooters the flexibility to tailor the setup to their preferred balance of recoil mitigation and sound moderation. Built for AR-15 compatibility, this barrel emphasizes consistent performance and accuracy potential, with a precise government profile that maintains stiffness and heat dispersion during extended shooting sessions. The combination of a stainless-surface aesthetic and robust nitride finish helps resist wear from heat and fouling, supporting long-term service in field, range, or competitive environments. Whether upgrading an existing carbine-length setup or assembling a precision-oriented rifle, this barrel from Faxon Firearms provides dependable extraction cycling and predictable point-of-impact behavior, while the pinned gas block ensures a solid, repeatable alignment that simplifies installation and maintenance.