I see sites with the PC carbines springs available. But, I can't find any info on when to replace springs. Which one's to replace and when, or are springs replaced for a reason? I guess I can find how many pounds of retraction of the trigger and bolt I have, but I don't know when it's best to replace the springs or to replace the springs for a certain reason. Any idea when I can get this info?
Wheeljack
Wheeljack