Radian Weapons R0903 Model 1 Upper 6mm Arc 18"

Radian Weapons Model 1 Complete Upper Assembly

The Radian Model 1 represents an uncompromising approach to upper receiver design. Built on a philosophy of using only the finest materials and most precise manufacturing methods, this complete upper delivers the kind of reliability and performance that serious shooters demand.

Key Features

• Caliber: 6mm Arc—a modern intermediate cartridge offering excellent ballistics in a compact package
• Barrel: 18" with 1:7 twist rate, optimized for 6mm Arc performance
• Gas System: Rifle-length for smooth, reliable operation
• Handguard: 17" M-LOK rail system for mounting accessories and maintaining control
• Charging Handle: Radian Raptor-SD with ambidextrous controls
• Bolt Carrier Group: Radian's enhanced design for durability and reliability
• Muzzle Device: Dead Air KeyMo brake for recoil management and suppressor compatibility
• Finish: Nitride steel with Cerakote coating for corrosion resistance and durability

Ambidextrous Design

Fully ambidextrous controls make this upper equally at home in the hands of left or right-handed shooters. No compromises, no workarounds—just intuitive operation for everyone.

Quality Assurance

Every Model 1 is hand-assembled by a trained gunsmith who personally inspects, test fires, and cleans the weapon before it ships. This meticulous attention to detail ensures each upper meets Radian's exacting standards. The Model 1 comes with a lifetime warranty, reflecting the company's confidence in its craftsmanship.