1911 Mag Catch Spring GI

If your pistol is more than 15 years old, you might want to consider replacing this often forgotten spring to ensure your magazine remains in your gun while firing.

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.