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ISMI 1911 Mainspring (Hammer) 19 lb Reviews

4.8 Rating 20 Reviews
Read EGW Guns Reviews

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

Great quality spring!
Helpful Report
Posted 1 year ago
A little mixed on the yes or no response because my 38 super wouldn't ignite CCI small pistol primers after I installed it causing reliability problems and had to remove it. Probably need a 20lb spring for reliability.
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Posted 2 years ago
I amazing, simple upgrades. Must have!
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Posted 3 years ago
this weight hammer spring is recommended for pistols firing full-power factory / your handloads. it is a real must when using full/reduced power recoil springs in your gm / comm. size frames. for most certain install in your personal protection defensive pistol !!!! tip: polish the inside of the mainspring housing to deburr, lube spring, spin-polish m/s cap & m/s housing retention pin. smooths cocking effort either manually or with the slide !!!
2 Helpful Report
Posted 5 years ago