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ISMI 1911 Mainspring (Hammer) 19 lb Reviews

4.8 Rating 24 Reviews
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Also available in 17lb or 22lb. These ISMI Springs are made from a stainless alloy 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 2 weeks ago
Works. No complaints
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Posted 2 months ago
Awesome customer service and great product
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Posted 2 months ago
Definitely lightened the amount of force it takes to recock the hammer. And helped me get my trigger weight down. And I most definitely appreciate the usps express delivery was more convenient and reliable got here on time and when they said it would be, a heck of alot better then fed ex. Thank you EGW NOW WHATS UP WITH A SPONSORSHIP FOR MY COMPITION/CHANNEL https://www.youtube.com/@Deserttactikool
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Posted 2 months ago
Really impressed with difference 19 lb hammer spring made with my light Bullseye loads in 4 1911’s
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Posted 3 months ago
Author didn't leave any comments.
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Posted 4 months ago
Second one I have purchased. Perfect fit and replacement. No more issues on either 1911 DS.
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Posted 4 months ago
Improves trigger pull and function of the pistol. I paired it with a 14 lb recoil spring.
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Posted 5 months ago