U.S. Marine Sgt. Travis Riggs with the Marine Security Augmentation Unit (MSAU), engages his target during a weapons field test of the M27 Infantry Automatic Rifle at Marine Corps Base Quantico, Va., Feb. 21, 2014.
The MSAU Marines conducted the live-fire range in order to familiarize themselves with the new weapons system. (DoD photo by Staff Sgt. Ezekiel R. Kitandwe/Released). Original public domain image from Flickr