Here's what you need to mount the new Trijicon RMRcc to your SIG SAUER P365XL. Made from hardcoat anodized steel, it replaces your pistol's rear sight to provide a rock-solid, low-profile interface between optic and weapon. Fits the SIG SAUER P365XL pistol Replaces the rear sight to allow mounting of RMRcc Steel with matte black hardcoat anodized finish Weighs 1.13 oz. Includes (1) mounting plate and (2) screws NOTE: Professional installation recommended Order today!