These 1911 Ignition Sets – 5 Piece will provide a crisp, match-grade trigger pull and guarantee flawless cycling with premium 1911 internal components from Extreme Engineering, EGW and Doug Koenig. Each 5 piece kit provides a match hammer, sear and disconnected and properly mated sear and main spring. Made from fully machined tool steel these parts are engineered to eliminate the tolerance variations found in factory MIM components