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Officers Mainspring (Hammer) ISMI 23 lb
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Officers Mainspring (Hammer) ISMI 23 lb

Product #: 10643
Price: $6.49

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Description

This spring is made specifically for Officer's model guns.

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.

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