American Made
Buy Machine Shop Direct
Need Assistance? Call us at 425.530.0837
18" 5.56 AR15 1/7 Socom Upper w/ 15" SDX (TM) M-Lok Rail
Your Price $369.99
Hardened Arms is pleased to announce our 18" 4150CMV barrels produced in house that have been air gauged and bore scoped to ensure top quality accuracy. The free float uppers lends itself to an increase in accuracy by not putting pressure on the barrel and the mid-length gas system softens the recoil allowing faster follow up shots. Our uppers are built from the ground up to be fast, accurate and reliable.

18" 5.56mm AR-15 Upper Receiver Assembly:
  • Hardened Arms M4 Feed Ramp Flat Top Receiver
  • Mil-spec 7075 Upper 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-B Steel Melonited High End Barrel
  • Chambered in 5.56mm (will also shoot .223)
  • 18" Socom Profile barrel with M4 Extension (same profile as an M4 without the grenade launcher cut ahead of the gas port)
  • 1/7 Barrel Twist
  • .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
  • 15" SDX( TM) M-Lok Railed

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, Short barreled rife restrictions. 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.
515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837