There have been threads on this before. I have a Nikon P-22 scope on my 15-22 and switch to a Vortex Strike Fire II when I want to use the red/green dot.
Currently a Vortex prism Spitfire 1x and 3x on 2 different ones, Nikon P-223 3x and Primary Arms 2.5x prism on 2 others and a Vortex Crossfire II 4-12x on my Performance Center one.
I picked up a P-22 Nikoplex from Rex on the forum. I've only shot it once but I think it will work out fine. But i admit to being a "scope *****" and was curious what others were using. One rifle is an excuse to but at least three scopes :-)