Another one that uses Federal HST with mine.
I'm currently using an appendix holster of Etsy thats working pretty well lol, but it definitely lacks the small intricacies of a nicer holster.
Once I get a light for it, I'll probably order a holster from Mckinatec Holsters, as they make good holsters that fit the rail adapters for the Sigs.
Optic wise, definitely want to try the Holosun 507k ...