Legend of Zelda Mastersword lightsaber hilt sleeve. I designed it to fit a lightsaber so the handle slides inside. The connections are not permanent b...ut can be glued together, just don't glue the guard to the handle then you cannot take the lightsaber out. Hole in the side of the handle is for the placement of the lightsaber button.
The hollow version for the "wing" of the guard to save on resin/filament but for resin just make sure to make the drain holes.
Fitted for lightsaber handle dimensions: (but I would still suggest test prints for fitting)