This is an article Dave Spaulding shared that he got from Greg Ellifritz, who I guess saw it by the original authors. I have no idea who he/they are but there is a lot of good, and a little controversial, information here. It could easily go into the Training and tactics sub forum, but there has been a lot of Red Dot activity here lately so I though it might fit.
Pistol Mounted Optics
Pistol Mounted Optics