October 9, 2013 An overview of how the AR-15 bolt carrier group works inside a direct impingement gas system. Share this gun video: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to share on Pinterest (Opens in new window) Pinterest Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Tumblr (Opens in new window) Tumblr
