Rival's Precision pistol slides the foundation of your build. It is centered on modern design and compatibility with a wide range of parts and accessories. The match-grade precision upgrade slide, is CNC machined from 17-4PH stainless steel with QPQ thermo-chemical case hardened finish and front and rear serrations for easy slide manipulation. Three window cuts allow for more efficient cooling and airflow. Model : Precision Slide Material : 17-4 Stainless Steel Finish : Black QPQ Case Hardened