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ISMI 1911 Mainspring (Hammer) 17 lb Reviews

5 Rating 32 Reviews
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Available in 17lb or 19lb. All ISMI Springs are made from silicone chrome instead of 150 year old music wire. Every ISMI spring is heat treated, shot peened & stress relieved to enhance durability, consistency and reliability. ISMI is a contractor of the U.S. government and produces springs used in machine guns with incredibly high cycling rates. Also, the creator of ISMI springs obtained his knowledge from extensive research in the development of springs used in Indy car racing. In independent testing, ISMI spring have endured in excess of 100,000 compression cycles. We don’t recommend going that long between changes however. With an ISMI spring, practice routine maintenance and change it once a year.
Warning: This product may be alloyed with trace amounts of lead and other elements which are known to the State of California to cause reproductive harm and cancer. To prevent exposure, do not alter the product by welding, grinding, etc. For more information, go to www.P65Warnings.ca.gov.

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Location:

52 BELMONT AVE,
QUAKERTOWN
Pennsylvania
18951

Exactly what I needed, shipped in timely manner and all around good communication with EGW
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Posted 1 year ago
Worked wonders in my 5in prodigy
1 Helpful Report
Posted 1 year ago
Author didn't leave any comments.
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Posted 1 year ago
Works great in my Springfield Prodigy 4.25"
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Posted 2 years ago
Worked perfectly the first shot and 200 rounds after. Ecxellent product and price. EGW Guns will be bookmarked on my computer.
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Posted 2 years ago
Great product as always fast shipping will always use EGW for my 1911 needs
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Posted 2 years ago
Christopher L
Verified Reviewer
EGW Parts always work period, best 1911/2011 parts made.
1 Helpful Report
Posted 2 years ago
Author didn't leave any comments.
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Posted 3 years ago