Sharps Bros SBUR04 Billet Upper Receiver
Sharps Bros SBUR04 billet upper receiver in 7075-T6 aluminum with mil-spec anodized black finish. Includes forward assist and dust cover. Compatible with .223, 5.56, .224 Valkyrie, 300 BLK, and 6.5 Grendel.
Sharps Bros SBUR04 Billet Upper Receiver
The SBUR04 is a precision-machined billet upper receiver built from 7075-T6 aluminum and finished with a mil-spec anodized black coating. This is a stripped receiver—ready for you to add your barrel, bolt carrier group, and charging handle to complete your AR-15 build.
Specifications & Compatibility
- Material: 7075-T6 aluminum alloy
- Finish: Mil-spec anodized black
- Caliber Support: .223 Remington, 5.56 NATO, .224 Valkyrie, 300 Blackout, 6.5 Grendel
- Barrel Nut: Mil-spec compatible with any standard AR-15 barrel nut
- Handguard: Works with any AR-15 handguard, including those with rear-facing tabs
- Included: Forward assist kit and dust cover (pre-installed)
What You Should Know
The SBUR04 features a mil-spec front end that ensures universal compatibility across the AR-15 platform. The port opening is optimized for intermediate cartridges and will not accommodate larger calibers such as 450 Bushmaster, 458 SOCOM, or 50 Beowulf.
This receiver pairs seamlessly with Sharps Bros lower receivers and any quality lower from other manufacturers. The billet construction provides superior strength and precision compared to forged alternatives, making it an excellent choice for both precision builds and reliable duty rifles.
