Introducing the Cross Machine Tool Ultra precision upper receiver, Part# UPUR-1, a pinnacle of engineering excellence designed to elevate your AR-15 platform to new heights. Crafted with precision from billet 7075 T6 aluminum, the UPUR-1 offers a remarkable 65% increase in strength and rigidity compared to the more commonly used 6061 aluminum, ensuring unparalleled durability and performance. The UPUR-1 is meticulously machined on a State-of-the-art 5-Axis machining center, a process that significantly reduces the number of operations and setups required. This advanced machining technique ensures the highest possible accuracy, surpassing traditional 3 or 4 Axis methods and results in a superior fit and finish. Whether paired with the UHP-15 lower receiver or any mil-spec lower, the UPUR-1 is engineered for enhanced functionality and performance. Its modern design not only improves the weapon system's aesthetics but also provides a sophisticated, contemporary feel that complements the AR-15 platform. Choose the Cross Machine Tool UPUR-1 for a receiver that embodies strength, precision and innovation, setting a new standard in the world of firearm components.

Machined using a 5-axis process from a 7075-T6 aluminum billet
M4 feed ramps
Engraved "T" Identifiers
1913 picatinny rail flat top
Mil-spec type III, class II, hard-coat anodized in black
Shell deflector
The forward assist is integrated into the receiver
Port for dust cover machined into the receiver
Enhanced wall thickness to improve structural rigidity
Compatible with mil-spec components
Compatible with the majority of aftermarket handguard and rail systems
Lifetime warranty against manufacturing defects
Supplied without a dust cover and forward assist assembly
Compatible with the "Tactical Link" enhanced battery assist lever

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WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).