Here is our giant pile of Airsoft Springs.
Theres everything from M90s-M190s. Even some random VSR10 Springs.
Possibly an MS210 Prometheus. We're not sure. Whatever the case may be, you'll likely never need to buy springs again if you have your own in-house spring tester.
Or what we tend to use is, use a long screw driver with the 50% length marked on the shaft. And Press 2 springs together, one known value and one unknown. You'll know what spring is "stronger" or "Weaker".
There is 17.5 Pounds of springs.
~10 Springs = 0.36lbs.
So there is approximately 486 Springs by weight. Lets say 450 Springs...
Raw retail value was probably ~$3-4k.... Yours for a fraction of the price!