I have a FNP 45 Tactical and I like to keep my flashlight and my TiRANT mounted as my home defense pistol second to my rifle
of course.  Anyways I have one of those velcro pistol mounting sheets for the door.The little holsters don't accomodate much.  So
I got a couple of these Leapers UTG holsters for $15 from opticsplanet with free shipping since I bought some other stuff. I figured
if it didn't end up well I didn't spend much but it turned out great and was perfect for the task. My TiRANT is at SRI being jailbroken.

They have a million straps on them.  Most of them completely secured with velcro but some stiched in.



Just cut the main straps off the back by cutting the threads that secure them to the hoster.


Theres a bunch of straps held on with just velcro securing the straps.  Take them all
off and you get this.



In that mass of cheap straps you cut off in the first step is
hidden some velcro.  Cut this piece off.




If you wear the pants have your significant other or mom sew the strap of velcro to the back of the holster.
You will probably need a sewing machine or a really strong needle.



You now have a holster that will accomodate a light, a suppressor, a spare mag, and I am pretty sure you could adjust it to fit a RMR or Fastfire.
I don't feel like unloading it so no muzzle shot.  I did unload this when fitting it.  My TiRANT is currently at SRI being jailbroken.  That's why it's not there.
Here's an old pic too.

Now I want a black FNP Tactical