Brownells BRN-4 14.5-inch Heavy Barrel Complete Upper 13.5-inch M-LOK Handguard Flash Hider

Description

Product Overview

The Brownells BRN-4 complete upper receiver assembly is built for AR-15 use with a 14.5-inch heavy-profile Faxon barrel and a 13.5-inch Midwest Industries M-LOK handguard. The upper is assembled with the gas system and muzzle device installed, and it includes key controls for ready range setup. The BRN-4 platform uses a billet upper receiver with matte black hard coat anodizing, along with a slick nitride BRN-4 bolt carrier group built around forged 8620 steel and a precision machined 9310 tool steel bolt.

Key Features

• Complete AR-15 upper assembly with barrel, gas system, handguard, and muzzle device installed
• 14.5-inch heavy Faxon barrel chambered in 5.56x45mm NATO with 1-7 twist and 1/2-28 muzzle threading
• Midwest Industries 13.5-inch M-LOK handguard with full-length Picatinny rail
• Vent-forward gas block matched to the barrel length to reduce gas sent rearward
• BRN-4 bolt carrier group with forged 8620 steel carrier and slick nitride finish, plus 9310 tool steel bolt
• Billet upper receiver machined to mirror forged-style contours and finished with matte black hard coat anodizing

Attach to your AR-15 lower and you’re ready to hit the range with a BRN-4 upper that’s built for a rigid, precision-focused setup.