The AR-10(T) Complete Upper Assembly features a triple-lapped stainless steel barrel floated within a rugged aluminum handguard. The Picatinny 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.
AR-10 uppers use 7075-T6 aluminum.
.875 at the Journal (Under the gas block)
Model: AR-10(T) rifle complete upper half
Caliber: 7.62X51 mm / .308
Barrel: 20" triple lapped, AISI 416R stainless steel, heavy, M-4 feed ramps
Rifling Twist: 1:10" RH
Muzzle Device: None
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 and forward assist 7075-T6 aluminum
Finish: Hard anodized aluminum, manganese phosphated steel