October 8, 2014June 26, 2013 Larry Potterfield of MidwayUSA demos how to build an AR-15 upper receiver. 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)