Rise Armament RA-6ARC-CU-GRY-18 Upper Receiver

Rise Armament 6mm ARC Upper Receiver

The Rise Armament RA-6ARC-CU-GRY-18 represents a complete, ready-to-mount upper receiver solution for the modern AR-15 platform. This is a purpose-built upper designed around the 6mm ARC cartridge, an intermediate round that delivers exceptional ballistic performance in a compact package.

Key Features

• Barrel: 18-inch 416R stainless steel with threaded muzzle
• Finish: Grey Cerakote coating for corrosion resistance and durability
• Caliber: 6mm ARC—a high-velocity intermediate cartridge with excellent accuracy potential
• Construction: Precision-engineered aluminum upper receiver
• Ready to Install: Complete upper assembly compatible with standard AR-15 lower receivers

Why the 6mm ARC?

The 6mm ARC cartridge has gained traction among precision shooters and hunters seeking a middle ground between 5.56 NATO and larger rifle rounds. It delivers superior ballistic coefficients and energy retention at distance while remaining controllable and ammunition-efficient.

Performance and Accuracy

The 18-inch barrel length provides an optimal balance between velocity, handling, and sight radius. The 416R stainless steel construction ensures consistent accuracy and longevity. The threaded muzzle accommodates suppressors or muzzle devices to suit your shooting discipline.

This upper receiver is an excellent choice for precision rifle competition, hunting, or long-range target work.