August 8, 2014 Four Guys Guns reviews the Sun Devil Adjustable Drop-In Gas System (ADIGS), including installation and range demo. Share this gun video:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)