Rise Armament Complete Upper 6mm ARC 18" – AR-15 Platform

The Rise Armament Complete Upper in 6mm ARC is a precision-oriented upper receiver assembly designed for AR-15 lower receivers. Chambered in 6mm ARC, this 18-inch configuration delivers excellent ballistic performance for mid-range precision shooting and hunting applications where higher BC projectiles and improved wind performance matter. The upper comes fully assembled and ready to install on any mil-spec AR-15 lower.

Constructed with a forged aluminum upper receiver and finished in black, this complete upper includes the barrel, bolt carrier group, charging handle, and handguard. The 18-inch barrel length optimizes velocity for the 6mm ARC cartridge while maintaining reasonable overall length. Installation requires only standard AR-15 takedown pins—no gunsmithing or additional parts needed.

• Caliber: 6mm ARC
• Type: Complete Upper Receiver Assembly
• Compatible Lower: AR-15 / Mil-Spec
• Barrel Length: 18"
• Material: Forged Aluminum Receiver
• Finish: Black
• Includes: Barrel, BCG, Charging Handle, Handguard
• Installation: Drop-in for Mil-Spec AR-15 Lowers