U.S. Marines attached to Scout Sniper Platoon, Weapons Company, 1st Battalion, 3rd Marine Regiment, "The Lava Dogs" pose as a Sniper Spotter team using the M110 Semi-Automatic Sniper System at Lava Viper aboard Pohakuloa Training Area, Hi., June 3, 2015. The M110 is gas operated, magazine fed sniper rifle that fires the 7.62x39 NATO round. (U.S. Marine Corps photo by Cpl. Ricky S. Gomez/Released)