Rmrsc...Optic cut.Wilson combat engineers have changed the wcp365 slide's shape and texture to make it more tactile under stress with wilson's exclusive x-tac pattern cocking serrations, side top serrations and heavy slide bevels all around.They have also perfected the action of the wcp365 and their spring modifications they can make the excellent 365 trigger even better.Frame Finish: BlackAction: Striker FireCaliber: 9mm LugerBarrel Length: 3.10"Capacity: 10+1Grips: Black PolymerSight Configuration: Fiber Optic FrontSlide Description: Optic Cut/Serrated