Most likely not.
If you have a custom formed hard holster, made out of something like kydex, almost certainly not. Tactical Application Rails, add more material to the area under the proprietary Sig attachment point, so the accessory mounted under this area will be in a lower position, and the whole assembly will likely be too large to fit in a holster not specifically designed for it.
If using the Pro Ledge Tactical Application Rail it adds about 1/4' width to the frame/grip module, so a holster would need to accommodate for that to work properly, as well as the different dimensions of the regular rails with attached accessory listed above.
If you have a softer material holster such as, leather, nylon etc, it may fit, if large enough to accommodate the firearm rail and light accessory combination.
Details of where you can find a Tactical Application Rail holster in the FAQ below.