I bet there's a market for some micro adjustable rear sights for all of the compact pistols that are being made these days.
Many of the fixed sights in those guns are set into dovetails and I would bet that many of the dovetails are the same and the front sights are close enough that they could be dialed in with the same adjustable rear sight.
I worked as a Toolmaker my whole life and a micro sized adjustable rear sight is something that could be fabricated without resorting to a lot of mind bending tricks.
I recently bought a Ruger LCP Max that has the fixed rear sight set into a dovetail. It shoots about 1.5" low at 30'. I've looked around for a micro adjustable sight for it and nobody makes one.
That's just one example.
