Brownells 75th Anniversary - A Shooting Heritage
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The RESOLUTE 100 5.7x28mm upper receiver has a 16.1-inch barrel and features CMMG’s patented Radial Delayed Blowback operating system. The receiver and hand guard are hard coat anodized and come with a pre-installed CMMG mil-spec charging handle, A2 Compensator and a CMMG RML15 M-LOK Hand Guard.

All CMMG Upper Groups come complete with BCG.

  • CALIBER: 5.7x28mm
  • BARREL: 16.1” 1:9 Twist, Medium Taper 416SS
  • MUZZLE: A2 Comp, threaded 1/2-28
  • RECEIVER: Forged 7075-T6 AL M4 type upper
  • HAND GUARD: CMMG RML15 M-Lok hand guard
  • FINISH: Hard Coat Anodized Receivers and Hand Guard
  • CHARGING HANDLE: CMMG Mil-Spec
  • WEIGHT: 4lbs 5oz
  • LENGTH: 25.2

CMMG - AR-15 MK57 RESOLUTE 100 UPPER RECEIVER 5.7X28MM

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Cartridge: 5.7 x 28 mm

Finish: Black

Style: Complete

Contour: Medium

Length: 16.1"

Muzzle: 1/2-28, ...

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