I needed a mini nuke for a Gaslands diorama I'm making and quickly put one together in Fusion. May be of use to someone.

This is ideally suited to resin printing, however, I have included a profile, which I've printed without issue on my X1C.  The profile is a 0.08mm layer height, which I recommend at this scale. 

Please note, this has a difficult overhang area underneath the bomb.  If it fails, please don't continue to print it in the hope that it will work.  If it didn't work the first or second time, it wont work the tenth, you're just wasting filament.  Change the support type to ‘normal - snug’ or experiment with your own support settings.