Sharps Rifle Company SBUR04 Upper Receiver: Precision for .223 & 5.56

Precision starts at the top of the rifle. For builders and operators who demand consistent fit, rugged materials, and broad compatibility, the right upper receiver defines how your AR platform will perform under service, hunting, or range conditions.

SHARPS BROS MFG BILLET UPPER RECEIVER

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SHARPS BROS MFG BILLET UPPER RECEIVER anodized black front view

Key features and materials

The SHARPS BROS MFG BILLET UPPER RECEIVER is machined from 7075-T6 aluminum — the same high-strength alloy used in Sharps Rifle Company lower receivers — and finished in anodized black for corrosion resistance and low signature. It ships with a forward assist kit and dust cover already installed, reducing build time and ensuring immediate functionality out of the box.

Mil‑spec front end and modular compatibility

Designed with a mil-spec front end, this billet upper accepts any AR15 barrel nut and is compatible with any AR15 handguard, including styles with rear-facing tabs. That makes it an ideal choice for builders who plan to use free‑float rails, low-profile gas blocks, or wraparound accessories without worrying about fitment headaches.

Caliber support and practical applications

Compatible calibers include .223, 5.56, .224 Valkyrie, 300 BLK, and 6.5 Grendel — a versatile spread that covers lightweight varmint setups (.223/5.56), extended-range hunters (.224 Valkyrie and 6.5 Grendel), and suppressed or short-barrel builds (300 BLK). Note the port opening is intentionally not large enough for larger big‑bore rounds such as 450 Bushmaster, 458 SOCOM, or 50 Beowulf, so plan caliber selection accordingly.

At a street price of $179.99, this upper balances billet construction and factory convenience with an accessible cost for serious builders. It pairs naturally with Sharps Rifle Company lowers for seamless aesthetic and mechanical integration.

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SHARPS BROS MFG BILLET UPPER RECEIVER installed on AR platform

Fitment tips for builders

Verify upper/lower alignment during assembly, confirm headspacing with the chosen barrel, and choose a gas system length that matches your intended barrel profile and role. The factory-installed forward assist and dust cover save assembly steps but still inspect function during the build process.

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People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.

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