RX Ready

The term RX-Ready is used by SIG SAUER to describe firearms that can be fitted with an optic by an end-user. Typically, RX-Ready firearms are handguns that come standard with iron sights but have a mounting area cut into the slide near the rear sight to fit a pistol red dot or reflex sight. SIG SAUER also makes RX-Ready slides for firearms that did not come with stock optic mounting capability.