Sharps Bros SBUR04 Billet AR-15 Upper, 7075-T6 Anodized

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. It’s suited to builders who want a durable, compatible upper receiver for a range of common AR-15 chamberings and handguard systems.