EGW Recoil Spring ISMI Flat Wire (for Officer's) 16 lb. – 10659

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 his knowledge from extensive research in the development of springs used in Indy car racing.