All Custom Products Barrels go through a 9 step process with some of the most state of the art and precise machinery on the planet. After machining and diamond honing, each barrel is hand inspected and hand polished for a finish that is near perfection. A smoother inner bore equals less friction within the barrel, which translates to fewer barrel breaks and a greater gas efficiency. CP’s Classic two-piece barrel system allows you to build a kit tailored to your needs, with only the bore sizes and tip lengths you want. In addition, two-piece barrels are available in more bore sizes than the one-piece Classic, and two pieces allows you the option to mix and match colors to show off your personal style!