Evolution Gun Works Mainspring Housing, GR4, Steel, Kimber, Colt, 1911, Stainless, Stainless, 11430

EGW ensures each part meets the strict standards of machining by using state-of-the-art automated equipment. You'll also find that the Evolution Gun Works Steel GR4 and GR5 Mainspring Housing fits seamlessly with the EGW bushings and EGW springs giving you the best of all worlds.