Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

The Cross Machine Tool Ultra Precision Upper Receiver Part# UPUR-1 is the perfect Mate to your UHP-15 lower receiver or would also be a great match with any Mil-Spec lower. The UPUR-1 is machined from Billet 7075 T6 Aluminum unlike the more commonly used 6061. Using the 7075 T6 aluminum gives the UP-UR a 65% increase in strength & rigidity over 6061 aluminum receivers. The UPUR-1 is machined on a 5 Axis machining Center to reduce the number of operations/setups required to complete. This machining process allows the highest possible accuracy to be obtained over the traditional 3 or 4 Axis machining method. The UPUR-1 is designed for increased function, performance & to provide an advanced modern appearance & feel to the AR15 platform weapon system.

SPECS:

  • machined from 7075 T6 billet
  • M4 feed ramps
  • Engraved “T” numbers
  • 1913 picatinny Rail flat top
  • Mil Spec Type III class II hard coat anodized Black
  • Shell deflector
  • Forward Assist machined into receiver
  • Dust cover port machined into receiver
  • Increased wall thickness for added rigidity
  • Compatible with Mil spec parts
  • Compatible with most aftermarket handguard/rail systems
  • Comes stripped without dust cover & forward assist assembly

CROSS MACHINE TOOL CO., INC. - CROSS MACHINE TOOL- AR-15/M16 BILLET UPPER RECEIVER

$209.95

In Stock

Cartridge: 223 Remington, 5.56 mm NATO, 300 AAC Blackout

Finish: Black

Style: Stripped