To try and save some folks some time. The Safariland 578 is kinda sorta a generic holster (some manner of Kydex) that comes in: Sub-Compact, Compact, Standard, Long and then Wide Standard and Wide Long (with paddle and belt loop mounts). If those sizes "as is" don't lock the gun in place perfectly the holster also comes with a shim to increase the flexibility in what guns will work. Those all appear to come in Black and Flat Dark Earth. The added bonuses are that the Wide Standard for the Tactical also fits with no modifications my Sig SP2022 and my Sig P250 (that one being a subcompact), I haven't tried it yet but would bet good money that the P250 Compact will fit as well with no modifications.
Then if you need the drop leg style you pick a Safariland version that works and then the attachment adapter and away you go. That making all of my other Safariland holsters now adaptable to leg drop! Be advised that I found the Safariland website less than user friendly. I went to Optics Planet.
Happy holstering!
Larry