The Radian Weapons Model 1 Complete Upper 6mm ARC 18" FDE brings Radian’s precision machining and thoughtful design to your AR-15 platform in a single, ready-to-run upper. Built around an 18" barrel chambered in 6mm ARC and capped with a Dead Air KeyMo muzzle brake, this upper is engineered for consistent accuracy and smooth recoil impulse. A 17" M-LOK handguard and fully ambidextrous Raptor-SD charging handle round out a package that blends clean lines with practical performance.

This upper is ideal for shooters looking to stretch the legs of the 6mm ARC cartridge for long-range range work, practical competition, or dedicated training without building a rifle from scratch. The rifle-length gas system and enhanced bolt carrier group are tuned for reliability and repeatable shot-to-shot performance. Paired with Radian’s reputation for tight tolerances and careful assembly, this Model 1 upper offers a refined way to upgrade a mil-spec lower into a capable precision gas gun.

Key Features:

• Manufacturer: Radian Weapons
• Model: Model 1 Complete Upper R0902
• Caliber: 6mm ARC
• Barrel Length: 18"
• Muzzle Device: Dead Air KeyMo Muzzle Brake
• Gas System: Rifle-Length
• Handguard: 17" M-LOK
• Charging Handle: Radian Raptor-SD
• Bolt Carrier Group: Radian Enhanced
• Finish Color: Flat Dark Earth Cerakote
• Type: Complete Upper Receiver For AR-15 Platform