Wolff SV/STI 170mm 38/9mm 13 Coil Spring - 10 Pak
Product ID: WLF76164
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Wolff SV/STI HI-Cap 13 coil Mag Spring have +10% extra power that Improves feeding and reliability in pistols with worn or weakened magazine springs.
These extra power magazine springs have 3 extra coils over factory magazine springs and are intended for use in repairing pre-ban magazines with custom base pads and magazine wells.
NOTE: Fitting may be required.