Brownells BRN-4 complete AR-15 upper built around a 14.5″ Faxon medium-profile barrel with a 13.5″ Midwest Industries MLOK handguard and a forward-vented gas system. The assembly includes the bolt carrier group and required controls so you can attach it to your AR-15 lower and get ready for range use.
Key Features
14.5″ Faxon medium-profile barrel chambered in 5.56x45mm NATO with 1-7 twist
1/2-28 muzzle threading and matched muzzle device configuration for the complete upper build
13.5″ Midwest Industries handguard with MLOK attachment and a full-length Picatinny rail
BRN-4 BCG with slick nitride finish; forged 8620 steel carrier and 9310 tool steel bolt
Billet upper receiver with matte black hard-coat anodizing for a precision fit and durable finish
Forward-vented gas block matched to the 14.5″ barrel-length configuration to help manage gas flow
A factory-built, test-fired complete upper designed to drop onto your AR-15 lower for a straightforward setup.
