Fusion, Pro- Series GRADE Fusion, Forged Stainless steel & PRECISION CNC MACHINED 40 Cal/10mm 1911 Commander pistol slide, in the white, This slide is very High Quality. Rear cocking serrations, standard rear .359 x 60 deg Bomar cut and .331 x 65 x .070 front dovetail cut already complete for you. Matte bead blasted top and surface ground sides. 40 Cal/10mm Breech face, Lowered and relieved ejection port, This is a Fusion PRO series Match grade 1911 Commander slide and will work with most Officers and Commander type 1911 pistols and clones. Made with 9mm firing pin hole to handle higher pressures.