Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4" Medium Barrel Black
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Overview
The Brn-4 Assembled Upper Receiver from Brownells features a complete assembly with a compact 10.4-inch barrel, making it an excellent choice for builders looking for a maneuverable option. The black finish provides a sleek appearance while ensuring durability and compatibility with a variety of lower receivers. This upper receiver is commonly found in short-barreled rifle (SBR) builds, ideal for close-quarters engagements and tactical applications.
Specifications
Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4" Medium 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" Medium Barrel Black to a build in February 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 $959.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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