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Sti recoil master

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What is the spring rate of the heavy Sti recoil master ?

12-13-14 lbs ?

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around 12 lbs for brand new 5" (5.40" unset) measured on a Secure Firearm Product spring tester.

note that the STI recoil springs are around .445 od / .355 id and std recoil springs are around .415-.420 od / .325 id

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around 12 lbs for brand new 5" (5.40" unset) measured on a Secure Firearm Product spring tester.

note that the STI recoil springs are around .445 od / .355 id and std recoil springs are around .415-.420 od / .325 id

Thanks for the info.

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I was thinking of replacing my heavy recoil master with a Dawson tool less guide rod and a 12 lb spring. Trying to get rid of muzzle dip after the slide closes.

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