The slide stops are hard to come by and for my CZ TSO I use a pin only as the slide doesn’t lock back with modified mags.

The slide stops are $30 and the pins are $10 when you can find them. So, I’d like to get more pins. I’ve only broken one pin in many thousand of rounds but I like to rotate. New pin in match gun, pin from match gun goes in practice gun. Repeat every so often, not as frequently as springs but 10-15k or so.