Cutting down a spring? | SIG Sauer 556 Forum

Cutting down a spring?

Discussion in 'The Machine Shop' started by glorifiedholeplugger, Jul 12, 2020.

  1. glorifiedholeplugger

    glorifiedholeplugger New Member

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    Stupid question. If I have a 556 patrol/pistol length piston, and I buy a recoil spring for a full length 556, can I cut that spring down to fit my patrol? Is it possible or is it stupid?
     
  2. CGRBB

    CGRBB Active Member

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    I don’t know if it will work, but it certainly isn’t stupid to try. It may depend on the nature of the different components though. In your patrol, you likely have a the fluted op-rod with the braided spring. If you don’t have that, you have a solid op-rod with a flat spring. I want to say that the OD of the op-rod differs between those two, and perhaps between them and a longer-gas 556 model as well. And the length of the spring from seat to seat on the op-rod between the two patrol/pistol systems is different too, I believe. And by cutting the spring, you’re likely sacrificing a closed end, which may lead to issues. But, like I said, if the spring isn’t super expensive, it’s certainly worth trying.
     
  3. Millerdaga

    Millerdaga Member

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