Aftermarket rail that allows certain ASA's to be moved forward or backwards, moving the tank to a more comfortable length from the marker. Also used to connect certain brands of ASA / OnOff adapters to paintball markers. This components is only compatible with very few markers and may be beneficial to those with older markers being refurbished.
Includes the rail with 2 screws to secure to marker (screws may not be compatible with all markers) and 2 screws to lock an ASA in place on the rail.