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.

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ISMI Chrome Silicon 1911 Firing Pin Spring
ISMI Chrome Silicon 1911 Firing Pin Spring Upgrade or replace worn-out springs for more depen..
$8.00
Out Of Stock
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ISMI Mag Catch Spring
ISMI Stainless Alloy 1911 Magazine Catcgh Spring   ..
$5.00
In Stock
ISMI Main Spring 15lb
ISMI Main Spring 15lb CAD designed and built to Aerospace specifications from chrome silicon,..
$8.00
In Stock
ISMI Main Spring 19lb
ISMI Main Spring 19lb CAD designed and built to Aerospace specifications from chrome silicon,..
$8.00
In Stock
ISMI Premium Main Spring 17lb
ISMI premium springs are manufactured exclusively with certified aerospace spec alloys; stainless..
$8.00
In Stock
ISMI STI Premium Magazine Spring
ISMI STI Premium Magazine Spring Standard Fits 140 mm 2011 STI/SVI Magazines ISMI premiu..
$15.00
In Stock
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