Description
The Sharps Bros SBUR04 billet AR-15 upper receiver is machined from 7075-T6 aluminum and finished with a mil-spec black anodize for durable corrosion resistance. This upper ships with the forward assist kit and dust cover installed and is intended for AR-15 style builds. The SBUR04 features a mil-spec front end compatible with common AR-15 barrel nuts and handguards. It supports .223 Rem/5.56 NATO and is also described as compatible with .224 Valkyrie, .300 Blackout and 6.5 Grendel configurations.
Key Specifications
The receiver is machined from 7075-T6 aluminum for strength and durability.
Finished with mil-spec black anodize for corrosion resistance.
Compatible with .223 Rem / 5.56 NATO and listed as compatible with .224 Valkyrie, .300 Blackout, and 6.5 Grendel.
Includes forward assist kit and dust cover installed at delivery.
Model designation is SBUR04 from Sharps Bros.
Designed to fit AR-15 pattern lower receivers and standard AR-15 components.
Overall dimension listed as 2.70 x 2.80 x 9.25 inches.
Specified width is 2.8000 inches, height 2.7000 inches and length 9.2500 inches.
Features a mil-spec front end compatible with AR-15 barrel nuts and handguards, including those with rear-facing tabs.
This SBUR04 billet upper provides a solid foundation for a precision-minded AR-15 build, blending aircraft-grade material and a mil-spec finish with practical features like an installed forward assist and dust cover. Its suited to builders who want a durable, compatible upper receiver for a range of common AR-15 chamberings and handguard systems.
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