The Switch-to-Center (STC) mount, jointly developed by EOTech and Gorilla. The STC mount provides a 2.26-inch height-over-bore optical axis and is designed to return the magnifier to a centered position over the bore when deployed. Its mechanism allows for rapid stowing and re-engagement, improving transition speed between 1x and magnification while maintaining a consistent sight picture and low profile.

These are officially only compatible with the G33. The G45 does mostly work, although it is a close fit. The G43 doesn't work at all.