I have about 100 rounds threw this slide. It's for a Glock 19 gen 3 and cut for a trijicon RMR and other red dots with the same footprint, a Glock store tungsten guide rod with a threaded barrel. Stock Glock internals with stock sights. It can also fit on the new Ruger RXM since they use gen 3 slides and components. Asking $300 for the slide minus the rmr and $600 with it included. It's a RM01 non adjustable, has the light sensor to adjust the brightness of the dot to work in different lighting.