Yes on the SS Slabside.
It has the factory trigger as far as I know so that will be the first order of business. Second order will be to decide to keep it open sites or scope/red dot.
If they have everything that came with it from the factory, optics are not a problem. The SS competition slab side came with a base and mount screws. As far as I know it was the only MKII model drilled and tapped at the factory.
