Frame Parts

Product Details This spring is made specifically for Officer's model guns.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,...

Product Details Also available in 17lb or 19lb. 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...

Product Details 22lb. ISMI Flatwire Spring. Works with 10509 Colt Defender KitISMI 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...

Product Details 16# Officers Flat Wire Recoil Spring, for use with 9mm Officers 1911. 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...

Product Details For 9mm Springfield 4"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...