This is a extended shoulder button for the PiBoy dmg. I found it hard to find the buttons on the back even with the extended buttons provided, so I made my own.
I would recommend printing with supports with low density, depending on your print material. There are small overhangs and bridging so make sure your printer is capable of these.
Hope this helps you.
Edit:
I forgot to mention that I had to enable "Allow single fill extrusion" for "Internal Thin Wall Type" for Simplify3D when using a 0.4mm Nozzle. So if some parts of the model like the cross and parts of the walls have gaps try enabling this feature or use a slightly bigger nozzle.
Added Two different versions. The V1 does stand out a lot! So when it lays on a flat surface the buttons will be triggered by the weight of the PiBoy.
V1 (Pictured above)= 0.2 inch (5.08mm) buttons
V2= 0.1 inch (2.54mm) buttons
The author hasn't provided the model origin yet.