Pretty much my go-to rmsc green dot optic - ADE Advanced Optics Spike Micro Green Dot Sight

I have owned and used a number of dot optics, starting with the Riton Tactix MPRD on a Glock 43x and a cheap ($60) "Creative XP" that surprisingly worked reliably. Along the way, I began to use the green dots as they were easier for me to see. I've used optics from Swampfox and Cylee with good results.
When looking for an optic, I now have several criteria:
1. Green dot
2. Auto on (shake to wake)
3. Auto dimming
4. Top access for battery
5. Cost not an arm and a leg

The Spike meets all of these except for the top mount battery. It's my go-to now when I need an optic for a narrow slide.

I used the Spike on a Taurus 24/7 converted from 40 S&W to 10mm. The Taurus is an oddball in that while it is a large bore, the slide especially at the top is narrower than a Glock 20/21, which uses an RMR width plate. The optic has held up through many magazines. I purchased a second one for a 9mm G48 project and never followed through on it. I replaced the Riton with that optic and like it a lot better.