Army Sgt. Jerrell Knight, assigned to the 39th Signal Battalion, adjusts the front sight post of an M4 carbine under the supervision of 1st Sgt. Scott B. Null and Staff Sgt. Astin P. Muse at the 25 m range on Chièvres Air Base, Belgium, Oct. 24, 2016.

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Size: 1731px × 1155px
Photo credit: © David Wa / Alamy / Afripics
License: Licensed
Model Released: No

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