Raptors Airsoft have put together a guide to airsoft AEG springs:
Hi, I wanted to let you know that we (Raptors Airsoft) have a new airsoft guide published about AEG springs, Guide To Airsoft AEG Springs.
This guide discusses the different types of springs, such as soft vs hard springs, long springs, and variable pitch springs. It also talks about installing your spring, how a new spring will act, and what the M stands for.
This guide will continually be improved, and we hope to have a spring chart comparing the FPS of different manufacturer’s AEG springs eventually. We also plan on creating a video about airsoft springs, and putting it in the guide.
I think this guide would be valuable to your visitors, so I was hoping you would tell your visitors about this new guide.
Thank you for your consideration, Mike Barnes (Raptors Airsoft)