Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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18" 5.56mm Socom 1/9 Melonited SDX Rail Rifle
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Your Price $799.99
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AR15 Rifle SDX Upper 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 Mil-Spec Steel 5.56 Barrel Machined In House
  • Black Melonite Finish
  • 1/9 Barrel Twist
  • Chambered in 5.56 NATO (will also fire .223 ammo)
  • 18" Socom Profile barrel with M4 Extension
  • .750" 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
  • SDX free float 15" handguard without end cap

Hardened Arms Forged Lower:

  • Mil-Spec 7075 Forged Lower
  • Mil-Spec Dimensions
  • Mil-Spec Lower Parts Kit Installed
  • M4 Collaspible Stock Installed
  • Works with all standard AR15 magazines    

Hardened Arms rifles 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, and rifles. 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.

Rifles must ship to FFL in your state, and may take up to two weeks for delivery from time of shipment. Magazine shown is not included with purchase. 
515 Tucker Ave, Friday Harbor, WA 98250 | sales@hardenedarms.com
Phone: 425-530-0837