Sharps Bros Billet Assembled AR-15 Upper Receiver - Aluminum Black

The Sharps Bros Billet Assembled AR-15 Upper Receiver in aluminum black is a precision-engineered component built for shooters who demand quality construction and mil-spec compatibility. Machined from 7075-T6 aluminum and finished with mil-spec Type III hard coat anodize, this upper receiver is engineered to pair seamlessly with any Sharps Bros lower and work reliably with standard AR-15 barrel nuts and handguards—including those with rear-facing tabs. Whether you're building a .223, 5.56, .224 Valkyrie, 300 BLK, or 6.5 Grendel rifle, this receiver provides a solid foundation for a dependable platform.

Assembly is straightforward: the upper comes with the forward assist kit and dust cover already installed, so you can focus on finishing the build without wrestling with small parts. The discrete Sharps Bros engraving on both sides adds a touch of character without the flash. At just 9 ounces, it won't add unnecessary weight to your rifle while maintaining the structural integrity you need for accurate, repeatable shooting.

This is not the receiver for large-bore cartridges like 450 Bushmaster, 458 SOCOM, or 50 Beowulf—the ejection port opening is sized for standard rifle rounds. If you're building a mid-length or carbine in a common intermediate cartridge, though, this upper receiver delivers the fit, finish, and compatibility that serious builders expect.

Key Features

• Billet 7075-T6 aluminum construction for durability and light weight
• Mil-spec Type III hard coat anodize for corrosion resistance and a professional finish
• Compatible with any mil-spec AR-15 barrel nut and handguard design
• Forward assist kit and dust cover pre-installed
• Designed for .223 Rem, 5.56 NATO, .224 Valkyrie, 300 Blackout, and 6.5 Grendel
• Pairs perfectly with Sharps Bros lower receivers

Specifications

Frequently Asked Questions

Will this upper receiver work with any AR-15 lower?

This upper receiver is designed to match all Sharps Bros lower receivers perfectly and features a mil-spec front end, making it compatible with standard AR-15 lower receivers as well.

What calibers does this upper receiver support?

The SBUR04 is sized and ported for .223 Rem, 5.56 NATO, .224 Valkyrie, 300 BLK, and 6.5 Grendel. The ejection port opening is not large enough for 450 Bushmaster, 458 SOCOM, or 50 Beowulf.

Does this receiver come assembled?

Yes. The forward assist kit and dust cover are pre-installed, so you can proceed directly to barrel installation and other build components.

What handguards are compatible with this upper?

Any mil-spec AR-15 handguard will work with this receiver, including those with rear-facing tabs, thanks to its mil-spec front end and standard barrel nut interface.