Radical Upper 300 Blackout 8.5" Complete Assembly

Radical Upper 300 Blackout 8.5" Complete Assembly

This complete upper assembly delivers a purpose-built platform for 300 Blackout shooting, whether you're focused on subsonic performance or general-purpose rifle work.

Key Features

• Barrel Specifications: 8.5" barrel in 300 Blackout with 1:8 twist rate
• Barrel Material: Chrome Moly Vanadium (CMV) with nitride finish for durability and corrosion resistance
• Contour: HBAR profile for balanced weight and heat management
• Rail System: 7" RPR M-LOK handguard for modern accessory mounting flexibility
• Muzzle Device: A2 flash hider for reduced muzzle signature

Design Philosophy

The 8.5" barrel length is optimized for 300 Blackout's subsonic and supersonic capabilities while maintaining a compact, maneuverable profile. The 1:8 twist rate stabilizes a wide range of bullet weights, from lightweight supersonic rounds to heavy subsonic loads. The HBAR contour provides sufficient mass for thermal stability without excessive weight.

Practical Application

This upper assembly works well for shooters building a dedicated 300 Blackout rifle or converting an existing platform. The M-LOK rail gives you modern mounting options for optics, lights, and other tactical accessories. The nitride finish on the barrel ensures long-term reliability in various conditions.