Radical Firearms FP85300HBAR7RPRBMSB 300 Blackout 8.5" Barrel

The Radical Firearms FP85300HBAR7RPRBMSB delivers reliable 300 Blackout performance in a compact 8.5-inch configuration. This heavy barrel profile provides enhanced accuracy and heat dissipation for sustained shooting sessions. The platform excels in close-quarters applications while maintaining effective range capabilities.

What Makes This Different

The heavy barrel (HBAR) profile sets this apart from standard pencil barrels by offering superior heat management and consistent accuracy during rapid fire sequences. The 8.5-inch length strikes an optimal balance between velocity retention and maneuverability. Chrome-lined bore construction extends barrel life significantly compared to non-lined alternatives, rated for over 10,000 rounds of standard ammunition.

Key Features

• Heavy barrel profile for enhanced accuracy and heat dissipation
• 8.5-inch barrel length optimized for 300 Blackout ballistics
• Chrome-lined bore for extended service life and corrosion resistance
• 1:7 twist rate stabilizes both subsonic and supersonic loads effectively
• Standard AR-15 barrel extension for universal upper receiver compatibility
• Government profile gas port for reliable cycling with various ammunition weights
• 416R stainless steel construction with nitride finish

Field performance demonstrates consistent sub-2 MOA accuracy with quality ammunition across temperature ranges from -20°F to 120°F. The heavy contour maintains zero stability during extended shooting sessions where lighter barrels would shift point of impact. Law enforcement agencies report reliable function with both 110-grain supersonic and 220-grain subsonic loads. The chrome lining resists fouling buildup, extending cleaning intervals during high-volume training.

Technical Specs

• Caliber: 300 AAC Blackout
• Barrel Length: 8.5 inches
• Twist Rate: 1:7 inches
• Profile: Heavy Barrel (HBAR)
• Material: 416R Stainless Steel
• Finish: Nitride coating
• Bore: Chrome-lined
• Thread Pitch: 5/8x24 TPI
• Gas System: Pistol length
• Extension: M4 feed ramps
• Country of Origin: United States

This barrel assembly provides the foundation for builds requiring both precision and durability in demanding environments. The heavy profile justifies its weight through superior performance consistency. Professional builders recognize the value proposition of chrome-lined construction at this price point.