Always Armed 18" 6mm ARC Gen 1 Upper Receiver

Unlock long-range accuracy and superior ballistics with the Always Armed 18" 6mm ARC Gen 1 Upper Receiver. Engineered specifically for precision shooting and extended-range hunting, this complete upper receiver assembly harnesses the flat trajectory and high ballistic coefficient of the 6mm ARC cartridge inside a lightweight AR-15 platform.

Built on a precision-machined Mil-Spec 7075-T6 aluminum upper receiver, this assembly features an 18-inch 6mm ARC barrel fitted with a .750 low-profile gas block and a mid-length gas system for smooth cycling and reduced recoil impulse. Encasing the barrel is a 15-inch free-floating M-LOK handguard, offering ample accessory mounting space and superior heat dissipation while ensuring your barrel remains stress-free for maximum shot-to-shot consistency.

Threaded with a standard 5/8x24 pitch, the muzzle comes capped with a classic A2 flash hider to minimize muzzle flash. Proudly made in the USA, this upper drops seamlessly onto any standard Mil-Spec AR-15 lower receiver. (Note: Bolt Carrier Group and Charging Handle are not included).

Key Features & Specifications:

• 18" 6mm ARC Barrel: Delivers optimized velocity and precision accuracy for long-range target and hunting applications.
• 7075-T6 Receiver: CNC-machined from high-strength aerospace-grade 7075-T6 aluminum to Mil-Spec tolerances.
• 15" Free-Float M-LOK Handguard: Maximizes accessory placement while keeping the barrel free-floating for sub-MOA potential.
• Smooth Recoil System: Features a mid-length gas system paired with a .750 low-profile gas block.
• Standard Thread Pitch: 5/8x24 muzzle threads fitted with an A2 style flash hider.
• American Made: Proudly manufactured 100% in the United States.
• Customization Ready: Ships complete minus BCG and charging handle so you can pair your preferred bolt setup.