I posted this up on my favorite 1911 forum, but figured this might be of interest to a lot of folks here as well. I couldn't find anyone who make a kydex rig for my particular gun a Springfield Armory TRP full rail, so... I made my own. I have worked with Kydex before fabbing up knife sheaths so this wasn't exactly brand new to me.
To make a Kydex holster you are going to need several things:
The gun or a mold of your gun.
Kydex (I use .060" or .080" or a mix)
A kydex press (more on that later)
A custom knife to cut the kydex (this is mandatory! ) Mine is a Brad Southard!
Rivets I use #8-10 1/4" black coated brass rivets
A press or punch/die set to seat the rivets
Some sandpaper or fancy belt grinder
A punch (mine is spring loaded)
1/4" drill bit and press/drill
A cookie sheet that will never see baked goods again
One awesome an understanding wife (aka use of the oven)
I am sure there is more but that should get you started. You can buy everything kydex specific from knifekits.com the other stuff you ought to have around or perhaps just consider buying one Im just saying!