a Chrome-Moly barrel with a phosphate finish, this AR upper receiver with a MLOK
rail is completely assembled and ready to pin onto your
existing lower receiver. The receiver is chambered for .300 Blackout. At Pickett's Mill Armory, we take pride in
selling upper receivers that are crafted from the finest materials. Each of
these short-barrel rifle receivers is test-fired before shipping to ensure
quality and safety.
Our .300 Blackout upper receiver features an M4 feed ramp flat-top receiver with feed ramps
on both the barrel extension and the upper. The 12 inch tactical free-float
M-LOK rail is designed to allow you to mount items and attachments while staying
off the barrel so as not to affect harmonics thus enhancing accuracy. It has a
black anodized finish that meets military specifications. Please note that this
10.5 inch upper receiver does not include a nitrided auto bolt carrier
and charging handle but they can be added. Order this upper receiver today for precision, quality and
safety you can count on.
- M4 Feed Ramp Flat Top Receiver.
-Black anodized mil-spec finished upper receiver.
-Feed ramps on the barrel extension and upper.
-4150 Chrome Moly Barrel.
-Phosphate barrel finish
-Chambered in .300 Blackout
-10.5" M4 Profile barrel with M4 Extension
-1/8 Barrel Twist
-.750" diameter at gas block
-5/8-24 threaded muzzle/barrel
-Low profile Steel gas block with carpenter 158 screws
-Pistol length gas system
-Flash Can Muzzle Device
-12" Tactical Free Float M-LOK Rail