Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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16" 6.8SPC II- HBar-1/10- Middy
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Original Price $369.99
Your Price $319.99
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We are pleased to announce the arrival of 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 Black Nitride 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- 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
    Black Melonited/QPQ 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" Tactical 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, Short barreled rife restrictions. 20% restocking fees 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