Rise Armament Complete Upper for AR-15 6MM ARC – 18″ Barrel, M-LOK Handguard, Patriot Brown (RA-6ARC-CU-BRN-18)

• Complete upper receiver chambered in 6MM ARC for AR platform rifle builds
• Includes 18 inch 416R stainless steel barrel with 1:7 twist rate
• Threaded barrel with 1/2x28 pattern for muzzle device attachment compatibility
• Features rifle length gas system for consistent cycling performance
• Equipped with 15.25 inch free float M-LOK handguard for accessory mounting
• Includes bolt carrier group and ambidextrous charging handle assembly

The Rise Armament Complete Upper RA-6ARC-CU-BRN-18 is a complete upper receiver assembly designed for AR-15 rifle builds chambered in 6mm ARC.

This Rise Armament Complete Upper includes an 18 inch 416R stainless steel barrel with a 1:7 twist and a 1/2×28 threaded muzzle. It features a rifle-length gas system, a 15.25 inch free float M-LOK handguard, and a black nitride bolt carrier group. This product is used for assembling or upgrading AR-15 rifles with a complete upper assembly. In standard configurations, the forged billet aluminum receiver is finished in patriot brown Cerakote and includes an ambidextrous charging handle. The upper is categorized under complete upper receivers and is suitable for range use or rifle configuration requiring a 6mm ARC platform.