A U.S. Army Soldier from the New Jersey National Guard’s D Company, 1st Battalion, 114th Infantry Regiment adjusts the rear sight on a Mk 19 grenade launcher during training on Joint Base McGuire-Dix-Lakehurst, N.J., July 26, 2018.
(U.S. Air National Guard photo by Master Sgt. Matt Hecht). Original public domain image from Flickr