The EGW Oversized Firing Pin Stop is specifically engineered for 1911 pistols in 40/10mm calibers with a durable blue finish for enhanced performance and reliability.EGW Oversized Firing Pin Stop for 1911Compatible with 40/10mm caliber 1911 pistolsOversized design for improved function and durabilityBlue finish for corrosion resistanceDesigned for rear sight cut applicationsThis precision-manufactured component is ideal for 1911 enthusiasts and gunsmiths looking to upgrade or replace their firing pin stop with a high-quality oversized option that ensures reliable operation.