This design is meant to be a press fit into the trapezoidal cutouts in the rails of the Xshot Longshot. This uses 2x toy screws (the normal screws that Nerf, Dartzone, and Xshot use to keep their blasters together). There are a ton of options for this, as the angle you want may change depending on what you want to mount.
To do any of the angled options with picatinny, you will need the left and right versions.
If you want to do picatinny on one of the sides, but not the other. you will need to print the side that you want with picatinny, then print the opposite side in the “Lock” piece. This piece will be kinda hard to get into the slot, but I wanted this to be tight so that it can't move around.
Look at the notes for each file to know the angle that they cant at from vertical. The one labeled “Matching”, matches the contours of the blaster, and has its picatinny parallel to the section of the shell that it sits on.
For printing: Print so that the “Front” face of the picatinny is on the bed (this will have the 45° degree angled bits pointing at the bed, yielding no supports for the actual picatinny, and will need supports for the bit that goes into the trapezoid on the blaster)
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The author marked this model as their own original creation.