For those of you with this combination, which key did you use?
Also, an OWB recommendation for this combo for range/competition use?
I already ordered my AIWB from Tier1.
Ultima Ratio Regum - the final argument of kings.
Not sure as to an answer to your question, but I like my TLR-7 very much.
Mine is setup with the UNIV-1 key. Im using a holster from blackpoint tactical but for 3oclock OWB CCW. Not the best holster I've ever used but does the job well. It doesn't have retention but should work for range use if that doesn't matter to you.
One warning, this setup does leave a lot of carbon buildup on the light just due to how close the muzzle it is. Fine for CCW use but you will definitely notice it on the range. I got a bunch of the CLENS stickers from Thyrm which solves the problem.