Holosun 507K is by far the very best micro purple dot sight for Glock 43X MOS (RMSc footprint). It can be designed for slim profile handguns, and its precisely the same width as the Glock 43X slide without the need of sticking out on the sides. Your Browser is Out-of-date https://kylerbrdpa.blue-blogs.com/22965220/not-known-facts-about-glock-43x-mos-slide