Proof Research Prefit Barrel for Mini Fix – .223 Wylde, 16", Carbon Fiber

The Proof Research Prefit Barrel for Mini Fix delivers match-grade accuracy in a lightweight carbon fiber barrel designed for direct installation on Mini Fix bolt-action rifles. The 16-inch barrel is chambered in .223 Wylde, allowing shooters to run both .223 Remington and 5.56 NATO ammunition with optimal accuracy. Proof's carbon fiber wrap over a match-grade stainless steel core reduces weight by up to 64% compared to traditional steel barrels while maintaining heat dissipation and rigidity under sustained fire.

This prefit barrel requires no gunsmithing for installation on compatible Mini Fix receivers. The barrel features a 1:8 twist rate optimized for bullets ranging from 55 to 77 grains. Proof Research uses aerospace-grade carbon fiber and proprietary stress-relief processes to ensure consistent barrel harmonics and zero shift. Thread pattern and muzzle specifications match Mini Fix platform standards.

• Type: Prefit rifle barrel
• Chambering: .223 Wylde
• Length: 16 inches
• Twist Rate: 1:8
• Construction: Carbon fiber-wrapped stainless steel
• Compatible Platform: Mini Fix bolt-action rifles
• Installation: Drop-in prefit, no gunsmithing required