Army Reserve Staff Sgt. Franklin Arnall, beach master and maintenance platoon sergeant, 329th Chemical Company, 92nd Chemical Battalion, makes adjustments to the headspace and timing of a .50 caliber machine-gun at a gunnery range on Fort Stewart, Georgia, June 25. Arnall and other Soldiers from the battalion are conducting two-weeks of gunnery training at the base to improve marksmanship, battlefield lethality and unit readiness. (Official U.S. Army Reserve photo by Sgt. 1st Class Brent C. Powell)