I've got a 9 Shield Plus PC, 4" barrel, SKU 13253, that came with a Crimson Trace 5 MOA red dot. I like it alot and it's one of my best shooters - fun range gun. I know people knock CT but I've had no issues with it, and I liked that it came with the proper mounting screws. It holds it's zero after removing and remounting - even has the original battery - bought it in 2022.
It's a relatively large gun with the optic and 15 round mag. making concealment more or a challenge. I'll typically carry a smaller gun - 9 Shield M2.0 PC with 3.1" barrel (no optic) or Bodyguard 2.0. Here are a few pics.