Any chance you'd be willing to give me the information on what adaptor plate and where you purchased it, I bought a 507c, same footprint as the k, I'm ok with a plate, I bought the Shield Plus as a back up concealed carry, my primary is a CSX and it's not optics ready. Galloway Precision has a new mill and their prices are very affordable. Thanks for any help you can render. ☮✌I’ve had my Shield Plus for about a month now and still struggling with RDS issues. First bought a Sig Romeo 0 and the controls were so difficult to access I sent it back. Then I mounted a Holosun 507k and I really like it. Only one thing, I had to use an adapter plate to mount correctly but after I did that, the lens was too high up to cowitness with iron sights. I would like to have a backup in case Murphy’s law rears it’s ugly head but still satisfied with the Holosun. Only other option I can think of is to have the slide milled to accept the sight W/O an adapter plate. Any other suggestions? It would be nice to have a list of RDS that mount directly to the Plus without using an adapter plate.