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K6: 20" Ultramatch Upper Receiver Assembly

Quick Overview

20" Ultramatch Upper

Availability: Available (built to order)



Touted by SWAT Magazine Editor Denny Hanson as "The most accurate AR15 I've ever shot", the K6 upper receiver is the top-half of the famous Ultramatch upper - Olympic Arms' premier accuracy rifle. 100% complete, headspaced and test fired, ready to drop on your lower. Chambered to.223 Remington Minimum SAAMI specs.

Standard Featyures Include:

  • 20" 416 SS bull barrel w/black oxide finish
  • True Mil-spec National Match Broach-cut rifling. 
  • 4- lands, 4 grooves
  • RH 1x10 twist (1x8 optional)
  • Forged picatinny flat-top upper
  • Blak-Tac bolt carrier
  • Forged charging handle 
  • Aluminum free-float handguard
  • Picatinny gas .940 block 


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Olympic Arms, Inc. is not affiliated with the IOC/USOC or any other Olympic sports organization.