Optic-Ready, Ergonomically Enhanced Slide With a Bundle of Custom Features Our RMR Slide for Sig P320 Compact pistols features distinctive, wraparound front cocking serrations that aid in manipulating the slide to check the chamber or clear a jam. (OK, we'll admit it: the serrations just look cool, too.) It also comes with a pre-cut slot for easy, secure mounting of a Trijicon RMR or Holosun red dot sight. All RMR Slides also have standard Sig Sauer P320 factory front and rear sight dovetails for "iron" backup sights. To get proper co-witnessing with the RMR, you will need to also install suppressor-height iron sights. You can also get your Brownells RMR Slide fo Mfg: Brownells