ISMI



ISMI premium springs are manufactured exclusively with certified aerospace specification alloys; stainless or chrome silicon. Then the springs are heat treated, shot peened and stress relieved after winding to enhance performance and durability. ISMI springs utilize the same design and manufacturing technology as used in IndyCar and Formula One racing.




ISMI Chrome Silicon 1911 Firing Pin Spring

ISMI Chrome Silicon 1911 Firing Pin Spring

ISMI Chrome Silicon 1911 Firing Pin Spring Upgrade or replace worn-out springs for more dependab..

$8.00

ISMI Mag Catch Spring

ISMI Mag Catch Spring

ISMI Stainless Alloy 1911 Magazine Catcgh Spring  ..

$5.00

ISMI Main Spring 15lb

ISMI Main Spring 15lb

ISMI Main Spring 15lb CAD designed and built to Aerospace specifications from chrome silicon, co..

$8.00

ISMI Main Spring 19lb

ISMI Main Spring 19lb

ISMI Main Spring 19lb CAD designed and built to Aerospace specifications from chrome silicon, co..

$8.00

ISMI Premium Main Spring 17lb

ISMI Premium Main Spring 17lb

ISMI premium springs are manufactured exclusively with certified aerospace spec alloys; stainless al..

$8.00

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