This optic has been given a Silver-tier rating by the National Tactical Officers Association.
The Holosun HS507C-X2-ACSS is the same proven 507C-X2 platform with the Primary Arms ACSS Vulcan reticle instead of the standard MRS dot and circle. If you've struggled to find the dot on a pistol red dot, this is the optic that fixes that problem.
The ACSS Vulcan uses a large outer ring that only appears when you're off-center, compared to the HS507C-X2 (everything else, including the housing, is the same), guiding your eye toward the 10 MOA center chevron. Once you're properly aligned the ring disappears from the window completely leaving just the chevron. It trains your presentation naturally and most shooters find they stop seeing the ring entirely after a few range sessions. The chevron can also be used alone with the ring deactivated.
Everything else is the same as the standard 507C-X2: 7075 T6 aluminum housing, RMR footprint, side-loading CR1632 battery tray, Solar Failsafe, Shake Awake and Lock Mode.