Match-grade precision upgrade slide. Recessed slide cuts for compatibility with RMR or other optics. CNC-machined from 17-4PH stainless steel billet for superior corrosion resistance and durability. Quench-Polish-Quench (QPQ) thermo-chemical case hardened to resist normal wear and tear even in the harshest conditions. Front and rear serrations for easy slide manipulation. Three window cuts for more efficient cooling and airflow. Individually hand-inspected for accuracy. No gunsmith required.