A new handle for this grenade by QuadView
Prop Grenade by QuadView | Download free STL model | Printables.com
Ps, (the picture is of mine after I did some heat treating for better cohesion, so there is some warping)
The author remixed this model.
when i printed the original model for the handle, It was barely a couple layers thick, so would snap way too easily, so I took the first model for the handle and modified the thickness. It so far has handled pretty well (though the weight might make the flick off a little less satisfying. Possibly a stronger spring might help)