I have had a few different red dots ranging from 1 to 5 dot that I attached to both rifle and handguns.
I have not had one in quite a few years, so there may be better options than the ones I had.
While the bigger dot will cover up 5" at 100 yards, you get used to how much it covers. On the ones I had there is kind of a visable fuzzy outer edge on the dot that cover a bit more. In bright light the 1 MIL dot could be hard to acquire quickly.
Mine all had good accuracy. I shot up to 200 yards.
I bought an thread on magnifier (1.5?) for one of them that also worked well.