This crap drives me nuts.View attachment 375947Footprints/Mounting Standards on Red Dot Sights - Optics Trade Blog
In this article, the most common footprints/mounting standards used on red dot sights are listed. Each standard is described and an image of it is added.optics-info.com
View attachment 375948
Looks like you'll need that mounting plate I posted, or you'll need to file off the rear lugs and shorten the front lugs.