Motley, thanks for reaching out. With such a new and popular gun like the Hellcat, you can expect that you'll be seeing a lot of holster options coming out for it (and there are a good amount out right now). The OSP option on the pistol can throw a bit of a curveball as there aren't a lot of micro guns like that set up for an optic. We ran a piece a while back on The Armory Life (https://www.thearmorylife.com/crossbreed-reckoning-hellcat-holster/) on the Crossbreed Reckoning holster for the OSP Hellcat. I had the gun set up with a Shield RMSc and found it to be a good fit and comfortable to carry. Check out the piece and see if that holster is a good choice for you.
Crossbreed holster will be my first choice for a Hellcat. And I second their comfort.