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Discussion Starter · #1 ·
We've just received the first shipment of ISMI M&P recoil springs they made for us, we have them in 20, 17, 15 and 13 pound weights. According to ISMI the factory weight is 15#. These springs work great with our stainless non-captured guide rods and the 13# works good with reduced loads in the .40.
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