Here’s a great article from Erik Gelhaus (Erik owns Cougar Mountian solutions and is a Gunsite Rangemastwr and wrote the Red Dot curriculum at Gunsite)
Anywho while this is a Glock/Aimpoint only proprietary design (you can only get the complete gun and COA mounted from Glock for the first year)
Mi feel this will be the new standard for direct mounting across the industry in the next 3 years.
I am hosting Gelhaus for a 1 or 2 day Red Dot class in Indiana June 21/22 if anyone is interested PM me if hit Cougar Mountain Solutions website)
Anywho while this is a Glock/Aimpoint only proprietary design (you can only get the complete gun and COA mounted from Glock for the first year)
Mi feel this will be the new standard for direct mounting across the industry in the next 3 years.
I am hosting Gelhaus for a 1 or 2 day Red Dot class in Indiana June 21/22 if anyone is interested PM me if hit Cougar Mountain Solutions website)

First Impressions - Aimpoint's COA and Glock's A-Cut - American Cop
For as long as we’ve been mounting miniaturized optics on pistol slides, there have been debates over the mounting footprints. Several designs have come and gone, while a few have established themselves across multiple manufacturers. Many have voiced a hope that the firearms and optics...
americancop.com