This is a recreation of the 10mm SMG from fallout 76, it is different from the one from 3 and New Vegas.
Took me about 9 hours to model, all in one day.
Im currently in the process of printing it, i will keep updated with photos.
A together model is there if the pre cut models are too big for your printer.
Mag is modeled with 0 tolerances, so you will need to sand it a little to make it work, i has no mag release, so it will only fit with friction/glue.