Gunnery Grind Army Staff Sgt. Shane Seleznoff loads ammunition into an M2-.50 caliber machine gun at Fort Riley, Kan., April 2, 2019, during Operation Gauntlet, a three-week exercise focused on gunnery skills. SHARE: Download: Full Size (0.31 MB) Tags: Army, Training Credit: Army Sgt. 1st Class Brent Powell VIRIN: 190402-A-BQ341-524C.JPG Photo Gallery