Brn-4(R) Complete Upper Receivers - Brn-4 5.56mm 10.4" Med Bbl Complete Upper W/9" Handguard
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Overview
The Brownells Brn-4 Complete Upper Receiver is a fully assembled unit designed for the AR-15 platform, featuring a 10.4-inch barrel chambered in 5.56 NATO. This compact upper is ideal for building a versatile firearm, providing a balance between maneuverability and performance, particularly for those looking to optimize for close-quarters engagements. Its design is commonly incorporated into short-barreled rifle builds where a shorter overall length is desired without sacrificing caliber effectiveness.
Specifications
Brn-4(R) Complete Upper Receivers - Brn-4 5.56mm 10.4" Med Bbl Complete Upper W/9" Handguard
Available Merchants(1)
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Stock Alert
Price and stock
The Brownells Brn-4(R) Complete Upper Receivers - Brn-4 5.56mm 10.4" Med Bbl Complete Upper W/9" Handguard 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 $1,309.99 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
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