AR-10® A-Series Carbine Complete Upper Half Assembly


The AR-10A4 Carbine Complete Upper Assembly features a double lapped, chrome lined barrel.  The MIL-STD 1913 rail on the upper receiver and the gas block allow rapid and repeatable interchange of removable iron or scope sights.

Each Armalite Complete upper assembly includes a forged upper receiver assembly, barrel assembly, bolt carrier group and charging handle assembly.  All complete upper assemblies are test fired as complete rifles before shipping.

Armalite’s A Series uppers will only work with an Armalite A series lower.

To know if you have an A series rifle or lower look at your serial number.  The serial number will begin with an A, for example A000001

In stock

7.62X51 mm / .308
16” double lapped, chrome lined / chrome moly, 4140 steel, M-4 feed ramps
Mid-length gas system
Rifling Twist
1:11.25” RH
Muzzle Device
Flash suppressor, threading: 5/8"-24
Front Sight Base
MIL-STD 1913 rail gas block. top of gas block is .398 (+/- .010) lower than top of receiver
Upper Receiver
Forged flat-top with MIL-STD 1913 rail 7075-T6 aluminum
Hard anodized aluminum, manganese phosphated steel