American Made
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Need Assistance? Call us at 425.530.0837
16" 5.56 M4 1/9 Melonite 12" HD Quad Rail - WITH BCG and CH
On Target With
Savings Of
Original Price $429.99
Sale Price $299.99
Get the longest sight radius possible on a 16" barrel with our new 12" HD quad rail. Built using our  4150CMV barrels produced in house, nitrogen stress relieved and bore scoped to ensure top quality accuracy. This free float upper lends itself to an increase in accuracy by not putting pressure on the barrel and giving you a long base for your bipod and accessories.

Upper Assembly with BCG and Charging Handle:
  • 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 5.56 Nitrogen Stress Relieved Barrel
  • Melonited barrel (Harder and more durable than chrome lining)
  • 1/9 Barrel Twist
  • Chambered in 5.56 NATO (will also fire .223 ammo)
  • 16" M4 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
  • Carbine length gas system
  • A2 flash hider
  • HD Quad Rail free float 12" hand guard
  • Mil-Spec Profile Melonited BCG
  • Mil spec Charging Handle

Fits any mil-spec AR15 lower receiver.

Hardened Arms uppers are factory direct to you at the best value in the marketplace while still bringing you precision accuracy and superior quality. All of our AR uppers are inspected and test fired prior to shipping. We build to tight tolerance Military specification from quality parts to ensure maximum reliability and performance. Because we are the manufacturer you save when you order a Hardened Arms upper.

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 any time after you order or if you cannot 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.

If ordering multiples please call us for less expensive combined shipping rates.

515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837