This is how i would do it. From top left to right and down . 1. Baseshape of where the fingers would go out 2. the back that would connect to it 3. fixed the finger shape 4. Meshes inside that i duplicated and scaled down to boolean 5. Union boolean the main shapes 6. Difference Boolean the holes 7A. Fixed topology 7B.…
Just do the bumps as floaters, like slightly squashed halved cylinders as in the example above to the right, but extrude the open edgeloop (where they touch the body) outwards so it lies flat against the surface of the gun. Less messy than modeling them into the body, and more flexible, but still smoothing as if they're…