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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

All good
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Posted 2 weeks ago
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Posted 3 weeks ago
This worked as advertised. My Mac 9 DS duty Comp feels great when combined with a 12 lbs recoil spring. It made a huge difference to my heavily sprung stock gun.
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Posted 4 weeks ago
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Posted 1 month ago
good springs!
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Posted 1 month ago
Really made this prodigy run smoother
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Posted 1 month ago
This is the right spring for the DWX!!
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Posted 2 months ago
Author didn't leave any comments.
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Posted 2 months ago