My printer is down, I haven't been able to test any of the recent models I've uploaded but putting them out for input and also so you guys can have a base to work from.
Update 20240501 - Added a version with the barrel
The author remixed this model.
The outer finger holes are angled towards the center for a more comfortable grip.
Filled in the cavities on the grips
Smoothed Finger placements
I've added mounting holes for the sight option:
https://www.printables.com/model/639342-sight-mount-for-slingshot
Sight mount to be used with this grip:
https://www.printables.com/model/639047-picatinny-grip-for-slingshot