I tried one from tulster that was label to fit those lights and it sort of fits but it’s not consistent in reliably being drawn it can get caught or just not come out easily depending how the angle you try to pull it out from, I got this light and wasted money on a r fitting holster for it to have some issues. BIG issue fir me personally is the one I got however the bottoms are set up different than the tlr, I just know the one I got has issues with when it’s in the holster and you go to pull it out it turns the light to already being turned on when you draw it I personally want the decision to turn it on. Also if it bumps inside the holster which isn’t hard for it to hit the button it can engage the light and I personally don’t want mine dying or have to set it to the lock position that’s a terrible thing to have to do and in defensive encounter have to pull it out and try to twist the end of the light to unblock and then engage it, you’re shot by then, if you find a good iwb holster that will fit a Glock 45 with this surefire xc3 respond to me and lmk