The circle part of the ACSS could be useful with a dot or even a smaller circle reticle.
However, I HATE the Vulcan reticle with the chevron.
I’ve seen several new RDS shooters buy Vulcan reticles to aid their transition from irons. The problem is they wind up focusing on the apex of the chevron like it’s a front sight instead of focusing on the target. This results in all the issues that occur when one is looking at / chasing the dot instead of maintaining target focus.
Chevrons work fine in LPVOs and prism optics like the ACOG but they are shit in an RDS on a pistol.