I came across a brand new in box, never fired FNP 45 today in FDE. $615, which I feel is a good price. A couple questions. I have shot one before and absolutely loved it. Will the FNX 45 mags fit this model? Will this fit the FNX 45 holsters. I also prefer to shoot with a blacked out rear sight and tritium front. Are these available at all , did a quick search and couldn't find anything and of coarse will the FNX sights be the same? It has a regular 3 dot white sites on it now, I may just take a sharpie to the rear sights and color them in. Anything else I should know?

I know for sure the mags are not interchangeable. Not sure on the holsters.

From everything I've read, the magazines are not interchangeable.  The holsters are though.

Update. Went and picked it up today! Found mags on Midway for 44 bucks I think, also on FNH's website for 50 bucks a pop.

There are still plenty of FNP 45 mag's out there.There is some websight that had fnx 45 mags for $34.00 each. I ordered five and they are FN mags new in box. I should have keep that website info and ordered more.