Part No. XM-100 for Tokyo Marui XDM-40 GBBNOTA: To install this new slide in the old models of Tokyo Marui XDM-40 GBB with sliding part number XDM-1 is also necessary to install the following parts: XDM-101 New Slide Rail LeftXDM-102 New Slide Rail RightXDM-103 New Piston