I have one with 30,000+ , one with 20,000+, one with 5,000+ and one with 1,000. The one with 30,000+ has shared dude on a CZ tactical sport .40 and an Sp01 Shadow. Milled into the slides. The key when you get a slide milled, make sure that it is milled with the mounting posts! Two post minimum, all four posts are best.