I have a Primary Arms Microdot mounted on my CROM. It was one of the first popular Aimpoint Micro clones I can remember. No issues with cowitness. My 1301 hasn’t killed it yet but I don’t shoot it much. It’s only had about 300 rounds through it since the dot was mounted. Mostly light birdshot with a smaller amount of Buck and random 3” magnum waterfowl loads someone gave me.