Enjoy using a slide-mounted reflex sight without needing suppressor height iron sights. The factory-installed ROMEO-X PRO optic sits incredibly low to the slide so you can enjoy co-witness with the included standard height iron sights, giving a consistent, familiar sight picture. This factory replacement, P320 RXP X-SERIES Stainless Steel slide assembly fits Compact size (X-SERIES & non-X-SERIES) grip modules. It accommodates the 3.6 barrel (not included).