Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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18" Stainless 1/9 Socom 12" Quad Railed Complete Upper
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Original Price $369.99
Your Price $299.99
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Complete Upper Assembly:

  • Hardened Arms M4 Feed Ramp Flat Top Receiver
  • Upper receiver is machined from solid 7075 billet aluminum
  • Black anodized mil-spec finished upper receiver
  • Feed ramps for increased feeding reliability on barrel and upper
  • Laser etched T-Marked upper receiver
  • 416r Stainless Steel Socom Barrel
  • 1/9 Barrel Twist
  • Chambered in 5.56mm (will also shoot .223 reliably)
  • .750" barrel diameter at gas block
  • 1/2x28 threaded muzzle/barrel
  • Low profile gas block
  • Barrel dimpled to secure gas block
  • Mid length gas system
  • A2 flash hider
12" Quad Rail
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. No waiting weeks for parts to come in or uppers to be built to, our website shows real time inventory of what is ready to go out the door to you immediately!

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