jeffery7466 78 Posted May 22, 2014 Hello guys, Just thought I should contribute to this community. I found some useful information that I would like to share with all of you. Spring Comparison chart: http://www.airsoftcanada.com/SpringChart.php by Brian Wong aka ILLusion Barrel Length: http://www.uwants.com/viewthread.php?tid=2316678&extra=page%3D1%26amp%3Bfilter%3Ddigest by 豹仔 Edit: I have re-posted the joules test in the Guides section of the forum, please take a look! Share this post Link to post Share on other sites