Optic Ready - Compatibility: ROMEO1-PRO, ROMEO2, Delta Point Pro, and RMR (requires sealing plate) footprint; XRAY3 Day / Night Suppressor height sights; Stylized relief cuts; Removable optics plate with top accessible screws; Durable Nitron Black finish; For use with the standard 9mm, 3.9" non-threaded, or 4.6" threaded barrels; For the P320 Compact (non-X-Series) and Full size (X-Series and non-X-Series) grip modules