Airsoft Top Dead Center mod for VSR-10 and APS2

thingiverse

This is an airsoft mod. Top dead center (TDC) mod for VSR-10 Gspec and APS2, like the L96, and possibly many more rifles. The vsr specific part goes on a 30mm outer barrel, the aps2 to a 25mm barrel. Glue an M4 nut into the tdcvsr.stl or tdcaps2.stl, then attach them to the barrel above the TDC hole. Place the tdcbottom.stl on top of that assembly. Insert and possibly glue the outside ring of the tdcspring.stl into the tdctop.stl. An M4 screw must move freely up and down in this assembly but have no side-to-side movement. You can use an M4 screw with a hexa head or simply tighten a nut onto any M4 screw. I used a nut. Experiment with the length of the screw until the spring is pushed about halfway with the hopup set, keeping the top tight. No support needed for printing; print the top upside down. UPDATE: The top now features finer clicks and the bottom has been raised to protect and guide the top better, with a slightly stronger spring.