Quality AR 15 uppers, AR15 parts, AR-15 rifle manufacturer. Friday Harbor, WA
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16" 300 Blackout Melonited 15" HD Quad Rail w/ BCG and Handle
Return To 300 Blackout AR15 Upper Assemblies | Proceed To Cart
Original Price $489.99
Your Price $379.99
Enjoy this 300 Blackout upper that has your name on it!  Barreled in a Hardened Arms made 16" 4150 chrome moly, stress relieved and air gauged barrel. Capable of cycling both super sonic and sub sonics suppressed and unsuppressed you will be set for the coming hunting season.

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
4150 chrome moly .300 Blackout Barrel
Chambered in .300 Blackout
Pistol Length Gas System
16" HBAR Profile barrel with M4 Extension
1/8 Barrel twist
.750" barrel diameter at gas block
5/8x24 threaded muzzle/barrel
Low profile gas block
Barrel dimpled to secure gas block
A2 flash hider
15" HD Quad free float quad rail Without  end cap
Mil-Spec Charging Handle

BCG Specs:
Black Melonited coated carrier and bolt
Individually MPI Tested
Bolt: 9310 Steel hardened, Shot Peened, and MPI tested.
Carrier: 8620 Tool Steel-(M16 full shroud)-Heat Treated, Case Hardened, & Melonited (harder than chrome).
Gas Key: Melonite Lined-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

Upper fits all 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.
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