Drop-in Kuna safety selector with more surface area and contoured, rounded ledges. Machined 6061-T6 aluminum, MIL-A-8625 hardcoat anodized. Sold per side, so a full ambi replacement means buying two.

HB Industries' Enhanced Thumb Selectors replace the factory Kuna safety levers with machined 6061-T6 aluminum selectors. The ledges have significantly more surface area than factory with contoured, rounded edges. Finish is a MIL-A-8625 Type 3 hardcoat anodize.
HBI sells these individually, one selector per order. The Kuna ships with an ambidextrous safety from the factory, so replacing both sides means buying two.
Add the HB Industries Kuna Enhanced Thumb Selectors to your build and see how it enhances your platform.