Radian Weapons Model 1 Complete Upper Features The Radian Weapons Model 1 Complete Upper is built around a 14.5 match grade barrel with a 1:7 twist rate and 5/8x24 threading with a Dead Air KeyMo flash hider permanently pinned to achieve a legal 16 overall barrel length for a non-NFA configuration that retains full Dead Air suppressor compatibility. A mid-length direct impingement gas system is optimized for the 14.5 barrel s dwell time for consistent cycling across the full range of 6mm ARC loads and the Radian Raptor-SD suppressor-optimized ambidextrous charging handle ensures reliable positive cycling for left- and right-handed shooters running cans or standard configurations. The enhanced black nitride M16 BCG delivers long-term corrosion resistance and reliable extraction across the 6mm ARC chamber. The complete 6mm ARC upper receiver is machined from billet 7075-T6 aluminum with M4 feed ramps and a lightweight forward assist topped with a proprietary 14 M-LOK aluminum handguard secured to the upper via an integrated stainless steel anti-rotation pin for a rigid zero-flex interface. Flat dark earth Cerakote finish covers all components for a cohesive corrosion-resistant field-ready aesthetic across the complete upper assembly and the sub-MOA accuracy guarantee with Black Hills match grade ammunition backs every hand-assembled unit. Radian s lifetime guarantee covers the Model 1 Complete Upper as a no-compromise 6mm ARC upper receiver for shooters who demand professional-grade accuracy and suppressor-ready capability. Radian Weapons Model 1 Complete Upper Specifications Manufacturer: Radian Weapons Model: Model 1 Complete Upper Type: Complete Upper Receiver Caliber: 6mm ARC Barrel Length: 14.5 (16 OAL w/Pinned Flash Hider) Barrel Description: Match Grade Threaded Twist Rate: 1:7 Thread Pattern: 5/8x24 Muzzle Device: Dead Air KeyMo Flash Hider (Pinned) Gas System: Mid-Length Direct Impingement Upper Receiver: Billet 7075-T6 Aluminum/M4 Feed Ramps Handguard: 14 M-LOK Aluminum Charging Handle: Radian Raptor-SD Ambidextrous Bolt Carrier Group: Enhanced Black Nitride M16 Finish: Flat Dark Earth Cerakote Compatible With: AR-15 Accuracy Guarantee: Sub-MOA w/Black Hills Match Grade Warranty: Lifetime