The Radian Weapons Radian Upper 18" 6mm ARC OD Green is a complete Model 1 upper built around precision machining and thoughtful ergonomics. Its billet 7075-T6 upper receiver, extended M-LOK handguard, and 18" 6mm ARC barrel with 5/8x24 threads are paired with a Dead Air KeyMo muzzle brake and Radian’s enhanced bolt carrier group for smooth, reliable operation.

This upper is well suited for precision-focused range work, practical competition, and medium-game hunting where the efficient 6mm ARC cartridge shines at extended distances. The rifle-length gas system and Raptor-SD ambidextrous charging handle help keep recoil manageable and cycling consistent, while the OD Green Cerakote finish offers a clean, modern look. It reflects Radian’s reputation for careful craftsmanship and attention to detail in every component.

Key Features:

• Manufacturer: Radian Weapons
• Model: Radian Upper 18" 6mm ARC OD Green (Model 1, R0906)
• Caliber: 6mm ARC
• Barrel Length: 18"
• Gas System: Rifle-length
• Muzzle Device: Dead Air KeyMo muzzle brake
• Handguard: 17" M-LOK extended aluminum handguard
• Charging Handle: Radian Raptor-SD ambidextrous charging handle
• Bolt Carrier Group: Radian enhanced M16 bolt carrier group
• Color: Olive drab green Cerakote