ISMI premium springs are manufactured exclusively with certified aerospace spec alloys; stainless alloy and chrome silicon. Each spring has been heat treated, stress relieved and shot peened to enhance performance and durability. These extra steps and quality materials ensure consistency and longevity many time that of standard music wire springs. All springs carry a 12 month manufacturer replacement warranty.
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Average rating 10 out of 10
( based on 1
review )

Magazine Spring
Ordered these springs because one of 170mm STI magazines was not feeding properly as the magazine emptied. Replaced the sping and all is fine.