Brownells Brn-4 5.56 Nato 10.4 in Heavy Chrome Lined Barrel Phosphate

The Brownells BRN-4 5.56x45 NATO 10.4'' Heavy Chrome Lined Barrel Phosphate delivers a rugged, chrome-lined solution designed for modern AR-pattern builds, combining a black finish with a heavy contoured profile that enhances rigidity and heat dissipation under rapid-fire sessions or prolonged shooting. This 10.4-inch barrel features a true 1-7 twist designed to stabilize a wide range of 5.56 NATO projectiles, while the 1/2-28 muzzle threads provide versatile compatibility with a broad array of sound suppressors and muzzle devices. The Chrome lining improves wear resistance and corrosion protection, extending service life in demanding environments, and the black phosphate finish helps maintain a low-glare appearance on the rifle platform. Engineered for reliability in compact rifle configurations, the BRN-4 chrome-lined barrel integrates with AR-15 style receivers and specific builds seeking a balance of compact length, consistent accuracy, and durable performance. The gas system length of 416 ensures appropriate cycling with standard OPS and gas-tuned ammunition, enabling smooth operation across typical 5.56 NATO loads. This barrel is a purpose-built upgrade for shooters prioritizing precision, durability, and versatility in a compact, ready-to-assemble platform.