Every Custom Products Barrel goes through a 9 step process on the some of the most technologically advanced and precise machinery on the planet. After it leaves the machine, each barrel is hand inspected and hand polished for a finish that is near perfection.
A smoother inner bore means less friction on the ball which translates to less barrel breaks and greater gas efficiency.
***The .679 Control Bore is available in Cocker thread and Black and Black Dust only****
***There will only be 100 of the .679 Control Bores released in the initial run***