I am a huge fan of the SIRT laser training pistol. It is incredibly useful for dry fire practice, and for drilling force-on-force integrated H2H methods safely but still having some concept of results (seeing the laser on the other person’s body), and it is great to ingrain the ability to shoot consistently from the #2 or #3 position.

https://nextleveltraining.com/

Here is a video showing it in action:

I get ZERO benefit from anyone buying one.  I have no interaction with anyone at Next Level and am not compensated in any way. I just think the product rocks.