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ISMI 1911 Mainspring (Hammer) 17 lb Reviews

5 Rating 48 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

All EGW products are excellent! Thanks!
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Posted 3 days ago
EGW Make great products for tuning your 1911, 2011, or whatever you have. They are great quality at a fair price.
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Posted 2 weeks ago
My firearm is the Mac 9DS5 inch supposedly comes with a 19 pound hammer spring. I honestly did not notice a difference in the 17 pound hammer spray.
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Posted 3 weeks ago
It fit great and works well.
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Posted 1 month ago
The parts are always good but the customer services is awesome and always a breeze with you all.
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Posted 1 month ago
Helped reduce disconnector to slide clash.
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Posted 1 month ago
Christopher M
Verified Reviewer
Perfect balance for the 10lb recoil spring (no more failure to feeds).
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Posted 3 months ago
Author didn't leave any comments.
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Posted 5 months ago