These ones, like the others, will not fit on a optic ready slide. The optics ready slides utilize the P2000 dovetail cut, but they are not the same height of the sights found on the VP9 OR for example. Because of this, if you use the P2000 sights we sell, you may see some POA/POI issues. At the moment, we do not produce sights for the OR model HK pistols.