I have a custom brown leather level 2 holster for an fnx-45 with a surefire x-300ultra. This holster indexes at the thumb break, so you can probably run the x-300 and other like-sized lights. I can't check the fit because I only own the x-300 ultra. The holster has been broken in and works great. I have only had it for about 45 days. I paid $200, asking $150. It was made by mernickle custom holsters in northern Nevada. Asking $150 shipped.