These are the lower co witness sights for a Glock 19 with an rmr or similar dot. They sit a tad lower to increase the window size of the optic. They should fit the 19x and 45 as well. $65 shipped.
Link to description of sights. https://suarezinternational.com/suar...hts-for-glock/
Picture of sights
https://photos.app.goo.gl/kKLFSEV26UDWAJSC6
