Rise Armament RA-6ARC-CU-BLK-18 6mm ARC Upper

Rise Armament 6mm ARC Complete Upper Receiver

The Rise Armament RA-6ARC-CU-BLK-18 represents a thoughtfully engineered solution for shooters seeking a modern, efficient cartridge platform. This complete upper assembly delivers the accuracy and reliability expected from quality AR-15 components.

Key Features

• Barrel: 18-inch 416R stainless steel with 1:7 twist rate, optimized for 6mm ARC ballistics
• Threading: 1/2x28 muzzle threads for suppressor or brake compatibility
• Gas System: Rifle-length configuration for balanced recoil management
• Handguard: 15.25-inch free-float M-LOK design for accessory mounting flexibility
• Bolt Carrier Group: Black nitride finish for corrosion resistance and durability
• Charging Handle: Ambidextrous for left and right-handed operation
• Finish: Hard-anodized aluminum for a professional, durable appearance

Why Choose This Upper

The 6mm ARC cartridge offers a compelling balance of velocity, energy retention, and magazine compatibility within the AR-15 platform. This upper's rifle-length gas system provides smooth cycling and reduced recoil impulse compared to shorter configurations. The free-float handguard isolates barrel harmonics for consistent accuracy, while the stainless steel barrel resists corrosion during extended shooting sessions.

Whether you're building a precision rifle or upgrading an existing platform, this complete upper simplifies the assembly process while maintaining the quality standards serious shooters demand.