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K16UR: 16in. K16 Upper Receiver

Quick Overview

16" Bull barreled match grade 5.56x45 target/hunting upper. Great for an Olympic Arms or any major brand lower.

Availability: Available (built to order)


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This is the top-half to the best value in accuracy-based AR15 carbines out there. The K16 is well known for its awesome performance right out of the box. Half-inch groups at 100 yards are the norm, not the exception with this upper. Chambered in 5.56x45 - capable of shooting both military surplus 5.56x45 or civilian .223 Remington.

The K16 upper comes standard with:

  • 1" 4140 Chromemoly steel Bull barrel
  • Picatinny flat-top upper
  • Picatinny Gas block
  • Button Rifled Match-grade barrel
  • Blak-Tac Bolt carrier
  • Magnu-fluxed, roll peened -better than 'mil-spec' bolt
  • Free-floating aluminum handguard assembly for superior accuracy
  • Lifetime Warranty!

K16 uppers are available in the following calibers, all standard with 416 stainless steel barrels. .

  • 300 AAC Blackout
  • 7.62x39 Russian
  • 6.8 Remington
  • 204 Ruger

When choosing optional handguards, the mid-length F85RP handguard option eliminates the picatinny gas block as the handguard itself covers the gas-block area. In this case the picatinny gas block will be replaced with a low-profile gas block instead.

If you like this model but are interested in a top-of-the-line Ultramatch barrel, let us suggest the ML-2 as a great alternative.

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