This top quality complete spring set for a full-size, 5" 1911 contains every spring needed to complete or upgrade your pistol. These heat treated music wire springs are the finest quality coil springs on the market and will provide you with exceptional service. Extra Power recoil springs are rated for standard velocity and high-velocity loads and a reduced power hammer spring improves your trigger pull and reduces the force required to cycle the slide. This spring kit contains the following springs: P10G18 - Spring, Recoil, Govt., 18 1/2# P26 - Extra Power Firing Pin Spring P27 - Reduced Power Hammer Spring 19# R15A - Mag Catch Spring R29 - Sear Spring R33PS - Plunger Tube Spring