Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4" Heavy Barrel Black
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Overview
The Brownells BRN-4 Assembled Upper Receiver features a complete assembly with a 10.4-inch heavy barrel, designed for enhanced accuracy and durability during operation. The black finish provides a sleek and tactical appearance while also helping to reduce glare. This upper receiver is commonly found in compact builds, where maneuverability and rapid handling are essential.
Specifications
Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4" Heavy Barrel Black
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Build history on GunPartPicker
Builders on GunPartPicker first added the Brownells Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4" Heavy Barrel Black to a build in March 2026.
It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $1,199.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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