Evolution Gun Works Recoil Spring ISMI Flatwire Government - 1911 20 lb

Evolution Gun Works Recoil Spring ISMI Flatwire Government - 1911 20 lb. s guide rod kit for Springfield and Officer?s model pistols. Requires ? guide rod. All ISMI Springs are made from silicone chrome instead of 150 year old music wire. Every ISMI spring is heat treated shot peened & stress relieved to enhance durability consistency and reliability. ISMI is a contractor of the U.S. government and produces springs used in machine guns with incredibly high cycling rates. Also the creator of ISMI springs obtained his knowledge from extensive research in the development of springs used in Indy car racing. Specifications for Evolution Gun Works Recoil Spring ISMI Flatwire Government: Manufacturer: Evolution Gun Works Color: Black Gun Make: 1911 Platform Gun Model: 1911 Weight: 20 lb Package Contents: Evolution Gun Works Recoil Spring ISMI Flatwire Government What firearm models does the manufacturer say Evolution Gun Works Recoil Spring ISMI Flatwire Government is compatible with? The manufacturer suggests that Evolution Gun Works Recoil Spring ISMI Flatwire Government is compatible with 1911Evolution Gun Works 10663: Government - 1911 Recoil Spring ISMI Flat Wire 20 lb