Rival Arms Ra-Ra10P002A Precision Slide With Front/Rear Serrations & Rms Cuts QPQ Black 416R Stainless Steel For Sig P365 Rival Arms' Precision Pistol Slide Is The Foundation Of Your Build. It Is CNC machined From 416R Stainless Steel With recessed Slide cuts For Compatibility With RMR Or Optics. Front & Rear serrations Make For Easy Slide manipulation, While Window cuts Are For More Efficient cooling And Airflow. Model: Precision Slide Material: 416R Stainless Steel Finish: QPQ