Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build KIT, 14.5" Heavy Barrel
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Overview
The Brn-4 Upper Receiver Build Kit features a stripped A4 receiver that is designed for building a lightweight and maneuverable AR-15 platform. With a 14.5-inch heavy barrel chambered in 5.56 NATO, this upper allows for enhanced accuracy and improved handling, making it suitable for a variety of shooting applications. This component is commonly found in builds aimed at tactical use or competition shooting where precision and reliability are paramount.
Specifications
Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build KIT, 14.5" Heavy Barrel
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Build history on GunPartPicker
Builders on GunPartPicker first added the Brownells Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build KIT, 14.5" Heavy Barrel to a build in June 2026.
Today the one retailer we track is out of stock. Listed prices start at $1,075.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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