Have a T-Rex Arms Sidecar holster for sale. Fits gen 5 Glock 19s with TLR-7s and has a spare mag slot. Only used it a few times otherwise its like new and sits in the safe.
Honestly I’m not entirely sure. I originally ordered it labeled as a gen 5 but with it being a light bearing holster all the retention is in the light so it may fit the subtle differences in the slide. Unfortunately I can’t verify for you so don’t want to tell you wrong.