Master Sgt. Chet Nance, 434th Security Forces Squadron combat arms noncommissioned officer in charge, measures the firing pin of an M4 rifle at Grissom Air Reserve Base, Ind., Jan. 28, 2014. Grissom’s combat arms instructors conduct inspections and repairs on eight weapons systems to ensure all Grissom’s 1,600 weapons remain mission ready. Tech. Sgt. Benjamin Mota)

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Size: 1936px × 1291px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

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