The Tippmann Flatline Barrel System puts backspin on the ball, which allows for up to 100 feet of increased distance, while still maintaining breaks on impact. This system will fit the Model 98, Model 98 Custom, and Custom Pro. The Flatline Technology produces a level and accurate shot which carries 50% farther than traditional barrels. By minimizing the trajectory of the ball and increasing accuracy, the player will increase the amount of targets, which would ordinarily be out of range. Kit Includes, Barrel, Barrel Shroud, Squegee and Barrel Plug/Sock. When we receive these from Tippmann, some have a barrel plug, and some have a barrel sock. We sell these kits as they come from Tippmann.