If you do not want to mill the slide or get an optics slide there are rear sight dovetail mounts by EGW for various red dots. The sight will obviously sit higher than a milled or optic ready slide. Last weekend fired my best target with a P220 Carry with an EGW mount with Burris Fastfire III.is there anyway to mount a red dot on an older sig 226, its a police trade it, my old eyes need a little help.