Originally Posted by kullwarrior
Just wondering is there a local hardware store that carries compression spring? I'm talking 1cm in diameter type. Currently my GBB pistol came with has a really weak recoil spring and there's no aftermarket. I'm unsure on how to measure tension and how is needed.
If you wish to measure the tension on a spring you could use a spring tension calibrator, however if you are testing a small spring you could just end up wrecking the spring. You can source a tension calibrator online or at some hardware stores.
If no existing aftermarket spring currently exists for your model something from another model maybe a sufficient replacement.