Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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10.5" 300 BLACKOUT Upper Tac Quad w/ BCG and CH
Return To 300 Blackout AR15 Upper Assemblies | Proceed To Cart
Original Price $525.99
Your Price $369.99
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Barreled Upper Assembly:
  • 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
  • T-Marked upper receiver
  • 4150 Chrome Moly High End Steel Barrel
  • Black Melonited Finish
  • Chambered in 300 Blackout
  • 10.5" HBAR Profile barrel with M4 Extension
  • 1/8 Barrel Twist
  • .750" 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
  • Carbine or 10" Length Tactical Quad Rail without Endcap (Rail length matched with barrel option selected)
  • Fits any mil-spec AR15 lower receiver.

BCG + Charging Handle:
  • Individually MPI Tested
  • Bolt: 158 Carpenter Steel Case hardened, Shot Peened, and MPI tested.
  • Carrier: 8620 Tool Steel-(M16 full shroud)-Heat Treated, Case Hardened
  • Gas Key: Grade 8 Hardened Fasteners, Permatex No. 3 sealed, Torqued to 60 in lbs, & Mil-Spec Staked
  • Cam Pin: 4340 Steel-Heat Treated & Phosphated
  • Extractor: Tool steel S7-Heat Treated to 48-53 Rockwell C & Phosphated
  • Black Melonite Coated providing three times harder and better wear resistance than standard chrome lining

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 | sales@hardenedarms.com
Phone: 425-530-0837