Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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16" 6.8SPC II- HBar- 1/10 Barrel 12" HD Quad Rail Upper-BCG-CH-Mag
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Original Price $499.99
Your Price $399.99
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Looking for something compact, deadly accurate and small in the hand? The ultimate package in the 6.8 SPC II caliber!  Custom machined in house and hand polished.  We start with the very best steel, 4150 CMV and then melonite the barrel.  We run a 1:10 twist to stabilize the heavier ammunition which affords a higher accuracy return.

Complete AR15 6.8 SPC II-  Barreled Upper Receiver Assembly:

  • Hardened Arms M4 Feed Ramp Flat Top Receiver
  • Black anodized mil-spec finished upper receiver
  • Feed ramps for increased feeding reliability on barrel and upper
  • Laser etched T-Marked upper receiver
  • 4150CMV 6.8 SPC II  Barrel
  • Melonited Finish
  • Stress Relieved for superior accuracy
  • Chambered in 6.8 SPC II
  • 16" HBAR Profile barrel with M4 Extension
  • 1:10 twist
  • .750" barrel diameter at gas block
  • 5/8x24 threaded muzzle/barrel
  • Low profile gas block
  • Barrel dimpled to secure gas block
  • Mid- length gas system
  • A2 flash hider
  • 12" HD Quad Rail rail (End cap option is available)

Fits any mil-spec AR15 lower receiver.

Hardened Arms uppers are high end, accurate, head spaced, inspected and test fired prior to shipping. They are built using stringent specs, top quality parts and procedures to ensure maximum reliability and performance. 

You are responsible for knowing your state laws regarding barrel lengths, pistol and short barreled rifle restrictions. A 20% restocking fee will apply if you cancel anytime after ordering or if you can not take delivery due to state restriction. Dealer programs are available on our website. Two year warranty against manufacturer defects. Finishes will wear with use, no warranties apply to finish wear.
515 Tucker Ave, Friday Harbor, WA 98250 | sales@hardenedarms.com
Phone: 425-530-0837