Expo Arms Combat Series Completed Upper Review / Primary Arms

Let's talk about this complete Combat Series upper from Expo Arms / Primary Arms. For around $400 you get a combat series phosphate and chrome barrel, a handguard with a very solid lock -up, and an upper with a dust cover, shell deflector, forward assist and T marks. Everything I've used from Expo Arms / primary Arms has been high quality and high value.

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From Primary Arms:
The Expo Arms Combat Series Barreled Upper Receiver offers a high-quality option for any build. The heart of this barreled upper is the Expo MIL-SPEC forged upper receiver assembly, upgraded with T-marks for repeatable optic mounting. The 10.3" Combat Series barrel has a chrome lined 5.56 NATO chamber and reliable carbine-length gas system. The 9.5" Combat Series handguard features M-LOK slots on 7 surfaces providing plenty of space for your favorite accessories. Topping off this upper is the Expo Arms/Forward Controls Design Extended Single-Chamber muzzle brake with Keymo suppressor mount to keep your flat and minimize recoil for fast, accurate follow-up shots. The Expo Arms Combat Series Barreled AR-15 Upper Receiver is the perfect choice for your next AR pistol or SBR build.

Note: Due to the Crane-Spec gas port size of .070” this barrel was designed to function both unsuppressed and suppressed with 5.56 NATO pressure ammunition. Unsuppressed use with lower pressure .223 Remington ammunition may not yield the best results regarding function.

Features:
7075-T6 forged aluminum MIL-SPEC upper
T-Marked
10.3" Combat Series barrel
Carbine Gas System
Chrome lined bore with phosphate finish
1:7 Twist Rate
9.5" Expo Arms Combat Series M-LOK Handguard
Expo Arms/FCD Extended Single Chamber Muzzle Brake with Keymo Mount

Expo Arms offers top-quality MIL-SPEC AR-15 components at rock bottom prices. Made in the U.S.A. and covered by Expo’s Limited Lifetime Warranty against manufacturer defects, material or workmanship problems, and even normal wear and tear.