I have a 507c ACSS Vulcan I picked up from ZachCZ. I don’t have a lot of time with it yet but I do like the chevron and the outer circle does work as described. I’m probably going to put it on the Para double stack “Frankenstein” 1911. I like that the chevron is a larger shape that is easier to pickup than a small dot and the top of the chevron offers a fine aiming point. Unfortunately they don’t offer the chevron on the smaller footprint (507K, EPS carry). The EPS carry has a ACSS version but it uses a dot reticle instead of the chevron. @wtburnette whenever I make it back down to Indy Arms you’re welcome to try it out.And the circle disappears if you are "on target" and appears and helps guide you on target if needed. Cool idea.
And thank you all for the advice.