Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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AR15 Rifle - 16" 300 Blk Melonited HBAR SDX Rail Rifle
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Your Price $799.99
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Find out what makes the 300 Blackout everyone's favorite caliber in the AR15 platform. A heavy hitting round with low recoil and superb suppression capabilities make it capable on the hunting grounds or for home defense. Now you can get into a 300blk rifle without breaking the bank.


300 Blackout AR15 Rifle:
  • 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 Stress Relieved 300blk Barrel Machined In House
  • Black Melonite/QPQ Finish
  • Stress relieved and crowned for superior accuracy
  • 1/8 Barrel Twist
  • Chambered in 300blk
  • 16" 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 (cycles both supers and subs)
  • A2 flash hider
  • SDX 10" free float rail

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 (Magazines not included with purchase)

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 will ship fully insured via UPS ground. Magazine shown is not included with purchase. 
515 Tucker Ave, Friday Harbor, WA 98250 | sales@hardenedarms.com
Phone: 425-530-0837