Want to get more range and control out of your X-7 or X-7 Phenom?  Look no further.  This kit includes a Tippmann Flatline Barrel kit and a RAP4 Carbine stock.  The Flatline Barrel uses patented backspin technology to add up to 250 feet range.  The carbine but-stock adds comfort and control to your firing. It also has multiple positions ranging from 7 inches to 11 inches (17.7cm to 27.9cm).