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ISMI 1911 Mainspring (Hammer) 17 lb Reviews

5 Rating 41 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

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Posted 1 month ago
Dennis W
Verified Reviewer
Incentivized
Worked better than expected. Zero light strikes.
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Posted 1 month ago
When paired with the combination of the 17# mainspring and the 8# recoil spring it has improved the overall performance of my pistols.
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Posted 1 month ago
Author didn't leave any comments.
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Posted 1 month ago
This and a few more springs from EGW really smoothed out my DWX to what I hoped it would be.
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Posted 2 months ago
Works great. Dropped the trigger weight by a lb.
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Posted 3 months ago
I bundled up the Firing Pin Spring with the Firing Pin and, the 17Lbs Main Spring. They made my 2311 a lot more smoother than it already was!
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Posted 3 months ago
Excellent
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Posted 4 months ago