I think stick has the wrong model plate in the link that link is for the 507c not the k. The 507k is a proprietary footprint and the 507 508 c and t use the Trijicon rmr footprint. He’s absolutely right on the brand of plates, you can’t beat them but if your running the 507k you’ll need a different model plate. However the 507k has a smaller windshield and all around smaller than the c and t versions. Having both I’d go with the larger optics that stick sent the plate link for on a g40 or any full size gun. But if you’ve already bought the 507k you going to need the plate for the 507 k in the below link. Or put the 507k on a 43x or 48 and get another 507c or t for the g40. Once you start down this road you find you don’t want to go back (if your actually shoot them)
https://chpws.com/product/v4-mil-leo-glock-mos-to-holosun-407k-507k/
