Brownells Brn M16A1 20in Rifle Length Upper 1-7 Twist 5.56 NATO

The BRN M16A1 Upper Receiver 20" Rifle Length from Brownells delivers a complete, ready-to-fire upper that blends authentic profile with modern reliability, featuring a Black finish, a 20" rifle-length gas system, and a lightweight contour to balance rigidity and maneuverability. Chambered in 5.56x45mm NATO with a 1-7 twist, this BRN16A1� 20" complete upper receiver is designed for precision and versatility, ideal for tactical, benchrest, or mid-range field applications where consistent velocity and stable bullet stabilization matter. The complete upper assembly integrates a compatible upper receiver, barrel, and forward components to streamline builds or upgrades, offering a clean, dependable platform that responds well to a wide range of 5.56 loads. Its lightweight contour reduces fatigue during long-range sessions while preserving accuracy, and the rifle-length configuration promotes smooth cartridge cycling and extended sight radius. Engineered for compatibility with common AR-style systems, this Brownells product supports reliable feed, accurate shot placement, and easy maintenance, making it a practical choice for shooters seeking a match-ready upper that preserves the classic M16A1 aesthetic with modern performance.