Brownells Brn-Proto® Receiver Set
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This is a serialized firearm.
Brownells
Overview
The Brownells Brn-Proto® Receiver Set is a precision-engineered assembly designed for AR-15 builds, specifically chambered in 5.56 NATO. Constructed from 7075-T6 aluminum and finished with a hardcoat anodized gray, this receiver set ensures durability and resilience under rigorous use. It's commonly found in rifle-length gas system builds, making it a reliable choice for those looking to create a stable and effective shooting platform.
Specifications
Build history on GunPartPicker
Builders on GunPartPicker first added the Brownells Brn-Proto® Receiver Set 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 $314.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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