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10.5" 300 Blackout 1/8 Melonited 10" Upper w/SDX(TM) Rail
On Target With
Savings Of
Original Price $329.99
Sale Price $279.99
Looking for something compact, deadly accurate and small in the hand? Hardened Arms is pleased to bring you our first slim line style 10" SDX (TM)  M-Lok Rail.  The SDX(TM) hand guard Features M-Lok attachment points at 3, 6 and 9 o'clock, with a full length picatinny rail on top. This rail is great for reducing hand fatigue and forend weight, Slim circumference rails are the top choice for competition shooters. At Hardened Arms, LLC we are known for our accuracy, with a 10.5" 4150CMV 300blk barrel, stress relieved and bore scoped, you can't go wrong!

AR15 Upper Reciever Assembly w/SDX(TM) Hand guard:

  • 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 .300 Blackout High End Barrel
  • Black Melonited/QPQ Finish
  • Stress Relieved for superior accuracy
  • Chambered in .300 Blackout
  • 10.5" HBAR Profile barrel with M4 Extension
  • .750" barrel diameter at gas block
  • 5/8x24 threaded muzzle/barrel
  • Low profile gas block
  • Barrel dimpled to secure gas block
  • Pistol length gas system
  • A2 flash hider
  • 10" SDX Mark II Slim Line MLok Rail (1.46" Cross Section, 1.3" Inner Diameter)
  • 1/8 twist

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, and short barreled 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 |
Phone: 425-530-0837