• 4140 Chrome-Moly steel
• 1:10″ twist rate
• 5/8x24 TPI
• Melonite nitrocarburized protective layer
• .750″ (medium) profile

The Quarter Circle 10 40 S&W Barrels feature hand-polished feed ramps and chambers, along with a melonite treatment making these barrels slick and easy to maintain. Each barrel is threaded to 5/8x24tpi, making QC10 barrels compatible with your choice of a wide variety of flash hiders, suppressors and any accessories of your preference. The QC10 barrels are made to a medium profile for good heat dissipation, weight and harmonics. The 1:10 twist rate is used to best stabilize the widest variety of ammunition possible. 

For more info, visit QC10