ISMI Magazine Spring for Sig Sauer P320 X5 M17 M18 - 17 & 21 Round Magazines, Plus 10%

Product Code: ISMI-MS-P320-21

Manufacturer: ISMI

Quantity in Stock

About this product+

Upgrade your firearm with the ISMI Plus 10% Extra Power Magazine Spring for Sig Sauer P320, X5, M17 & M18 - 17 & 21 Round.

Fits Sig Sauer Model(s): P32, X5, M17 & M18. (17 & 21 Round Magazines).

ISMI Plus 10% Extra Power Magazine Springs are beneficial when utilizing extended capacity plates or replacement worn out springs in high-capacity mags such as in the Sig Sauer P320 & like models. This extra power aids in the travel distance and power needed for proper ammo feed.

When using new magazines and / or plus power magazine springs it may be difficult initially to load magazine to full capacity, especially for low cap magazines or magazines without extension plates. Springs may require a break in period before being able to fully load.

ISMI Premium Springs are manufactured exclusively with certified aerospace specification alloys; chrome silicon. Then their springs are heat treated, shot-peened and stress relieved after winding to enhance performance and durability. Chrome silicon springs have 1x the life of traditional music wire springs, and they hold much better tolerances during compression and cycling.

These springs utilize the same design and manufacturing technology as used in IndyCar and Formula One racing. In a typical 500 mile race, a valve spring in an IndyCar will go through more than 2,500,000 compression cycles. Consideration of factors such as modulus, wire diameter, mean diameter, active coils, total deflection, spring relaxation, maximum service temperature, and operating environment, results in you having modern spring technology available for your pistol.

Disclaimer: "Sig Sauer" is a federally registered trademark of SIG Sauer, Inc. or SIG Sauer GmbH & Co.KG. NDZ Performance has NO affiliation in any manner with, or otherwise endorsed by, SIG Sauer, Inc. or SIG Sauer GmbH & Co.KG. The use of the word "Sig Sauer " on this page is merely to identify which firearm these parts or components are compatible with.

NDZ always recommends any part be installed by a qualified and trained gunsmith. NDZ promotes the use and/of safety practices and gear when working on any firearm.


Product Features+

Manufacturer: ISMI
Manufacturer SKU: P320-21
Brand: ISMI
Type: Magazine Spring
Country/Region Of Manufacture: Made in the USA.
NDZ Custom Kit: No
For Gun Make: Sig Sauer
For Gun Model: P320 - 17 & 21 Round Mags
Model: Plus 10%