Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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16" 300 Blackout Mel LumaShark(TM) upper
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Your Price $879.99
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A 300 blackout 16" rifle upper with a pistol length gas system for all your ammo weight needs.  The LumaShark(TM) is an illuminated, weaponized, 12" free float hand guard whose patented features have eliminated the need for bulky bolt on flashlights on the AR Platform. It is the ultimate tactical AR15 hand guard on the market to date!

AR15 300blk Pistol 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
  • Chrome Moly Steel High End Barrel
  • 1/8 Barrel Twist
  • Chambered in 300 blackout
  • 16" HBAR Profile barrel with M4 Extension
  • .750" diameter at gas block
  • 5/8x24 threaded muzzle/barrel
  • Low profile gas block
  • Barrel dimpled to secure gas block
  • Pistol length gas system (allows better cycling of all types of ammo)
  • A2 flash hider
  • 12" LumaShark(TM) Free float hand guard with 2 lights
    • *Ergonomic built in dual 1150 lumen illumination
      *T6061 Aluminum hand guard with proprietary barrel nut
      *6061-T6 Type II Anodized
      *Ships with Two CREE 1150 lumin lights
      *Constant and momentary On/off buttons "gloved hand"
      *IP68 Waterproofing to 16 feet
      *Ships with CR123a standard batteries
         (compatible with CR123a rechargeable)
      *MLOK slots for additional accessory mounting
      *Keychain tool for quick bulb changes
      *1.8 IP to allow room for suppressor options
      *Light weight (19.84 ounces with batteries installed

      Mission specific options available for an additional fee:
       Infrared
       flush On/Off buttons
       Pressure Pad (single or double format)
       Red Laser

      Proudly machined and assembled in the USA
    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 rifle and 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