I have the 507k on a hellcat and it's been fantastic. It blends quite well with the slide profile giving you a very accurate compact package. It does of course make the pistol a bit harder to pocket carry but iwb you'd never know the difference. Functionally it works without issue, no shifting of the zero, easy to aquire dot and runs well at speed. Multiple reticles is cool but I leave the eotech one on. For the hellcat they left 4 posts on the optic cut and I had to Dremel the rear two flat. Cost of doing business I suppose but this is the only optic of this size that I was interested in anyways so that's not a hard sell. I believe the 365xl only has posts on the front if I remember correctly so it should be a non issue for you. It has a rear sight built into the unit which is great as you lose the rear sight on the 365s for the optic cut. Side battery tray is a plus. My photo-fu sucks sadly.
If you are looking for a RDS for your 365xl or hellcat etc I'd say this is currently the one to get.
Posts: 2332 | Location: Pnw | Registered: March 21, 2009
I installed a Holosun 507K on my P365SAS using a Nameless plate. Took it to the range yesterday and dialed it in. It is a outstanding optical. I like it much better than the Romero Zero I have one my P365XL.