ArmaLite AR10 (B) 3 Gun Upper Assy 18" bbl UAR103GN18B ArmaLite Parts


AR10 (B) 3 Gun Upper Assy 18" bbl  


UPC: 651984016893

The AR103GN’s are Armalite’s flagship competition rifles that are built to win. This upper is light and ultra-fast. The low profile handguard covers a free-floating 18-in barrel with Armalite’s own tunable muzzle brake. An adjustable gas block also allows the rifle to be individually set for optimal performance with a wide variety of ammunition. Includes a bolt carrier group and charging handle.

*Compatible with Armalite AR-10® B-Series lowers.


Attachment Method MLOK

Product Line AR-10® Uppers

Product Category  Competition B Series

Caliber .308 Win | 7.62x51

Barrel HB, Match Grade, Stainless Steel

Barrel Length 18"

Twist Rate 1:10RH

Muzzle Device Armalite Tunable Competition Muzzle Brake

Front Sight Base

2" MIL-STD 1913 Rail Section

Handguard 15" Competition

Upper Receiver

Forged, Flat-Top with MIL-STD 1913 Rail, 7075-T6 Aluminum

Charging Handle "Raptor" Ambidextrous

Finish Hard Anodized Aluminum

Length 29.5"


Bolt Carrier Group, Charging Handle


More Information
Barrel Length

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