Staff Sgt. Christopher Hoffman, 627th Security Forces Squadron combat arms instructor, identifies each component of an M-4 carbine rifle to a class of McChord Airmen, April 9, 2014 at Joint Base Lewis-McChord, Wash. Enlisted combat arms instructors are certified security forces members who have completed the Combat Arms Apprentice Course at Joint Base San Antonio, Texas and serve as the professionals of small arms training within the Air Force. (U.S. Air Force photo/Staff Sgt. Russ Jackson)
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