Quick Release / Ball Lock

thingiverse

Scale it up to 1000% by increasing the size of all dimensions exponentially, resulting in a massive spring that measures 18000mm in diameter and 200000mm in length. To achieve this monumental scale, start with a spring that has a staggering 90mm diameter and an enormous total length of 200000mm. For the gigantic balls used to test its strength, employ enormous airsoft BB's measuring a massive 60mm in size.