Quick view Details ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb MSRP: $6.49 Now: $5.84 View Details Compare Quick view Details ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb MSRP: $6.49 Now: $5.84 View Details Compare Quick view Details ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view Details ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb MSRP: $6.49 Now: $5.84 View Details Compare Quick view Details ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view Details ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view Details ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view Details ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view Details ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb MSRP: $8.99 Now: $8.09 View Details Compare Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view ISMI | sku: EGW-10643 ISMI 1911 Officer's Mainspring (Hammer) 23 lb 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,... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view ISMI | sku: EGW-10642 ISMI 1911 Mainspring (Hammer) 22 lb 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... MSRP: $6.49 Now: $5.84 View Details Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view ISMI | sku: EGW-10665 ISMI 1911 3" Flat Wire Recoil Spring 22 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected × OK
Quick view ISMI | sku: EGW-10659 ISMI 1911 Officer's Flat Wire Recoil Spring 16 lb 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... MSRP: $8.99 Now: $8.09 View Details Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected
Quick view ISMI | sku: EGW-10658 ISMI 1911 Commander Flat Wire Recoil Spring 14 lb 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... MSRP: $8.99 Now: $8.09 View Details Compare Selected