The Wilson Combat .38/9mm Firing Pin is a precision-engineered component designed for the 1911 series of pistols including Commander Government and Officers models. It accommodates both AAR_38/357 caliber (.357-.359) and AAT_9 mm (.355-.356) rounds ensuring reliable performance and enhanced firing capability. Crafted to meet the exacting standards of Wilson Combat this firing pin enhances the functionality and reliability of your 1911 firearm making it a must-have for enthusiasts seeking top-tier performance.