Ballistic Advantage Pistol Barrel SIG P365 Standard/X Macro Comp QPQ Non-Fluted 1-10 Twist Black. Known for its strength toughness and good ductility our pistol barrels feature a hardened 416R stainless steel material for absolute durability and corrosion resistance. Each barrel is honed lapped and tumbled to ensure it is free of any imperfection and ready for flawless performance with no break-in period required. All barrels are held to less than .0001 deviation of the bore reaching better than factory tolerance for optimum reliability and accuracy. Specifications for Ballistic Advantage SIG P365 Standard/X Macro Comp QPQ Non-Fluted Pistol Barrel: Manufacturer: Ballistic Advantage Color: Black Finish: QPQ Caliber: 9mm Luger Gun Make: SIG Sauer Barrel Material: 416R Stainless Steel Barrel Twist Rate: 1-10 Flutes: No Quantity: 1 Country of Origin: USA Package Contents: Ballistic Advantage SIG P365 Standard/X Macro Comp QPQ Non-Fluted Pistol Barrel Ballistic Advantage BAPSS65SN1QI: Pistol Barrel SIG P365 Standard/X Macro Comp QPQ Non-Fluted 1-10 Twist Black