Radian Upper 18" 6MM Arc Brown
Premium Radian complete upper receiver in 6MM Arc with 18" barrel, 1:7 twist rate, and rifle-length gas system. Features Dead Air KeyMo muzzle brake, 17" M-LOK handguard, Raptor-SD charging handle, and enhanced bolt carrier group.
Radian Upper Receiver Assembly — 6MM Arc
Radian Weapons has engineered this complete upper receiver around a philosophy that refuses compromise: the finest raw materials, precision CNC machining, and component selection that reflects decades of professional firearms development.
Key Features
- Barrel: 18" medium-profile 6MM Arc with 1:7 twist rate
- Gas System: Rifle-length for reliable cycling and reduced recoil impulse
- Muzzle Device: Dead Air KeyMo brake for modular suppressor compatibility
- Handguard: 17" M-LOK rail system for accessory mounting flexibility
- Charging Handle: Radian Raptor-SD with ambidextrous controls
- Bolt Carrier Group: Radian enhanced design for reliability and longevity
- Finish: Cerakote in brown for durability and aesthetics
Built to Last
Every Radian upper is hand-assembled by a trained gunsmith who inspects, test-fires, and personally verifies each component meets exacting quality standards. This attention to detail extends to ambidextrous controls throughout—a practical feature for both left and right-handed shooters.
Radian backs every product with a lifetime warranty, reflecting confidence in materials and craftsmanship that simply won't quit.
Features
- sub-moa accuracy guarantee w/ black hills match grade ammunition
- billet machined 7075-t6 upper receiver w/ m4 feed ramps
- proprietary extended aluminum handguard w/ magpul m-lok modular mounting system and integrated upper/handguard stainless steel anti-rotation pin
- chambered in 6mm arc
- 5/8x24 thread pitch
- enhanced black nitride m16 bolt carrier group
- lightweight forward assist
- radian raptor-sd suppressor-optimized ambidextrous charging handle
- direct impingement gas system
- 18 rifle length gas system"
