Brn-16A4 Complete Upper Receiver - Brn-16A4 5.56x45 NATO 20'''' Bbl Upper Receiver
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Brownells
Overview
The Brownells BRN-16A4 Complete Upper Receiver is a fully assembled upper designed for the AR-15 platform, featuring a 20-inch barrel chambered in 5.56 NATO. With a rifle-length gas system and a 1:7 twist rate, this upper is optimized for stabilizing a variety of bullet weights, ensuring reliable performance and accuracy. This upper receiver commonly appears in builds focused on precision shooting and longer-range engagements, making it suitable for both competitive and recreational use.
Specifications
Brn-16A4 Complete Upper Receiver - Brn-16A4 5.56x45 NATO 20'''' Bbl Upper Receiver
Available Merchants(1)
Prices checked
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Build history on GunPartPicker
Builders have been adding the Brownells Brn-16A4 Complete Upper Receiver - Brn-16A4 5.56x45 NATO 20'''' Bbl Upper Receiver to their builds on GunPartPicker since February 2026. All time, it ranks #643 of the 1,681 upper receivers builders have added.
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 $479.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
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