FMP HK21 Links vs belts, what does all this mean?!?

A brief explanation of an interesting find on this FMP HK21 build

[@geoffnelson64]

Perfect explanation! Thanks for everything man. This process has been great. Really looking forward to the "modern" build 😎 Geoffrey

[@shawnwillis7561]

Thanks for the video. I bought some belts and links. I think mine has the same norrow tooth. I hope it runs well with belts though. I kinda prefer the easier pick up of the belt