A hard hitting pistol upper chambered in 300 blackout. Perfect for keeping locked and loaded as a close quarters pistol/SBR or hunting coyotes in the woods. Capable of running supersonic ammunition or subsonic ammo (AR lower buffer spring may need to be tuned for load). Complete with a Tactical Quad rail to attach an angled foregrip, flashlight and other accessories.
AR15 300blk Barreled Upper Receiver 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
Chrome Moly 4150 High End Steel Barrel
Black Melonited Finish
Chambered in 300 Blackout
8.5" 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 length Tactical 7" Quad Rail WITHOUT Endcap
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 and short barreled rifle restrictions. A 20% restocking fee will apply if you cancel anytime after ordering or 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.