This is the epitome of the Custom Products tactical line - the CP Tactical barrel does not have the most intense menacing name in the world, but it has that quality and performance you have come to expect with all CP barrels. This standard one-piece barrel comes with a removable tip that can be changed out with other tips and add-ons. To add accessories simply remove the thread protector tip by unscrewing it and screw on your accessories. The 18 inch version of the barrel comes with the swiss tip and is flute down the entire length of ther barrel. The 10 inch Cocker thread only version, was designed for the BT TM-7 to fit the shroud and give you the accuracy that CP is known for with the looks and ability to change tips to meet your every need. The A5/X7/Phenom Version will fit all three markers, but will not fit the stock shroud of the X7 if you want a barrel that will, please get the X7/Phenom version of the barrel.