16" Stainless Steel 300 blackout with a 12" Quad Rail, BCG and Charging Handle! This setup makes the ultimate 30cal AR15 for hunting or just punching really large holes in things. The extended rail allows for a longer sight radius, bipod attachment near the muzzle for added stability and extra rail attachments space. These upper receivers feature a pistol length gas system for added reliability and flexibility in ammo selection as the shorter system runs at higher pressures for the some times finicky 300 blackout round.
AR15 300blk Pistol 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
Laser etched T-Marked upper receiver
416r Stainless Steel .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
Tactical 12" free float quad rail Without end cap
Mil-Spec Charging Handle
Melonited carrier and bolt
Individually MPI Tested
Bolt: Carpenter 158 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.
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
Dealer programs are available on our website. Two year warranty against
manufacturer defects. Finishes will wear with use, no warranties apply
to finish wear.