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18mm spring coupler for using two 18x100mm springs — image 1
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18mm spring coupler for using two 18x100mm springs

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This coupler lets you use two 18x100mm springs in place of the 18x200mm recoil spring without binding. print in PETG.

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The assembly video says using two springs is ok, but I was afraid they'd get bound up. I came up with this little coupler to join two 18x100mm springs, while keeping them centered on the guide rod.

I printed mine in leftover PETG-GF, but regular PETG should work fine.  No supports