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16" 5.56 M4 1/9 Tactical 10" HD Quad Rail Upper
On Target With
Savings Of
Original Price $269.99
Sale Price $239.99
Looking to build a tested battle rifle?

Hardened Arms 16" M4 is designed to deliver the performance and accuracy you demand. Used by police forces, private contractors and private citizens it is the go to AR15 rifle and pistol configuration. The sixteen inch barrel provides the best mix of ballistic performance, durability and weight savings and
maneuverability for our countries infantry. Machined in house from machine gun rated 4150CMV barrel steel with Melonite coating that out performs military interior chrome coating specifications it will last most shooters a lifetime. Chambered in 5.56 NATO Hardened Arms LLC, barrels are stress relieved, air gauged and machined in house to give you the accuracy and reliability that you are looking for..

Whats Your Mission?

Whether you are going to war, patrolling the streets or looking to hit the range with friends the 10in. quad rail will afford your unlimited configuration options. Full length picatinny rails on all four sides means your vertical foregrip, back up iron sights, mounted flashlight, bipod or other accessory can easily be secured in any position. The handguard is attached to a large aluminum barrel nut via 8x button, head hex screws for secure mounting and easy
maintenance. A 16 inch barreled upper will allow you the ballistic velocity for accurate hits out to 500 yards while being light enough to carry all day long.

Worry free operating.

If there is on thing you should never doubt is the company behind the rifle you rely on. We are known for our customer service and strive to treat our customers like family. Our uppers fit all "mil-spec" lower receivers and  are designed to last a lifetime. We machine our parts in house so we can stake our name on every part that leaves our shop. When you buy from Hardened Arms your buying from the machine shop, so you get the highest quality parts, with no middle men, at prices that leaves most gun shops to shame.

16" 5.56mm M4 AR15 Upper Assembly Specifications:

  •     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 Button Rifled Machined In House Barrel
  •     Black Melonite QPQ Finish
  •     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 Hardened Arms gas block
  •     Barrel dimpled to secure and align gas block
  •     Carbine length gas system
  •     A2 flash hider
  •     Jam nut (1/2-28)
  •     Hardened Arms 10" Free Float Quad Rail (end cap available as an upgrade)

Fits any mil-spec AR15 lower receiver.
515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837