AR Buffer Springs are pretty Involved

Watching it now, and one of the things I would have liked to see would be captured spring setups like the JP or Armaspec.

I Just returned a JPS-OSR.308 spring, waiting on the Tubbs spring. It makes all the sense in the world. Once I watched his video it helped me to understand open and closed bolt spring load. That JP spring was really hard to put the bolt in a close and open mode.