I designed this for a friend, it fits perfectly for a CYMA VSR10 with an action army zero trigger. It should work with any trigger though, as it is only bound to the back screw. The back tab may require some sanding, I added a bit of extra material there because some stocks have a slightly larger slot.
I recommend thick walls with this, I used 2mm.
For best results, print at 45 degree angle.
v2.stl | 39.1KB |