Brownells Brn-15 5.56Mm 13.7'' Bbl .750'' Gas Block Upper Receiver

Experience unparalleled precision and reliability with the Brownells BRN-15 5.56mm Upper Receiver. Designed for enthusiasts who demand the very best in performance, this upper receiver group offers the ultimate foundation for your next custom build. Crafted in the USA, it boasts a 13.7-inch barrel and a robust .750-inch gas block, providing an optimized length that's perfect for both precision shooting and rapid response scenarios. Whether you are looking to enhance your tactical capabilities or simply enjoy an afternoon at the range, this upper receiver delivers a shooting experience like no other.

Imagine the thrill as you load up a magazine, feeling the smoothness of a bolt carrier group slide into place atop a meticulously engineered upper receiver. The BRN-15 features a nitride-finished 4150 CMV barrel that is chambered for 5.56x45mm NATO ammunition, ensuring superior durability and corrosion resistance. With a 1:7 twist rate, this barrel excels at stabilizing a diverse array of bullet weights, allowing you to tailor your ammunition to suit any shooting style. And when those rounds start flying, the A2 flash hider minimizes muzzle rise, giving you the advantage of quicker follow-up shots during high-stakes situations.

The unique MLOK handguard is another standout feature, extending past the gas block to maximize usable real estate. This design not only allows for ample attachment points for accessories but also enhances your grip and control when things heat up. Anti-rotation tabs secure the handguard in place, eliminating any twisting that could impact your accuracy. Large vents positioned towards the rear of the handguard facilitate rapid cooling, keeping your rig comfortable and firing fluid.

Built around a forged 7075-T6 upper receiver with hardcoat anodizing, this upper group is constructed to withstand the rigors of sustained fire and demanding environments. M4 feed ramps ensure reliable chambering of rounds, while the knurled forward assist pin simplifies maintenance and component swaps for those who love to customize their firearm. Experience the excellence and craftsmanship of an upper that is truly 100% American made, engineered to meet the highest standards of the industry.

Key Features

• 4150 CMV (Chrome Moly Vanadium) barrel
• Chambered in 5.56x45mm NATO
• 1:7 barrel twist for stability
• 1/2-28 muzzle threads compatible with standard accessories
• A2 flash hider included for reduced muzzle climb
• Forged 7075-T6 upper receiver for maximum durability
• Hardcoat anodized finish for corrosion resistance
• M4 feed ramps in both upper and barrel extension
• Marked "5.56 NATO 1:7 4150CMV SR" for easy identification
• 100% American made quality

Technical Specifications

What's in the Box

• Brownells BRN-15 Upper Receiver
• 13.7 inch Barrel with gas block
• User Manual and Installation Guide

Compatibility & Requirements

• Compatible with AR-15 lower receivers
• Requires a bolt carrier group and charging handle (not included)

Dimensions & Weight