Before I went for the range, I tossed an HS509T around the AR 410 and did a quick zero with buckshot masses. I really like these minor optics on shotguns and make use of the circle and dot reticle. The circle is for buckshot, plus the dot is for slugs. https://charles-daly-ar-410-compl97307.ageeksblog.com/19866414/not-known-details-about-charles-daly-410-ar-shotgun