Sgt. Jacob Preisler, Gunnery Skills Test grader for 2nd Squadron, 13th Cavalry, 3rd Armored Brigade Combat Team, 1st Armored Division, explains the track-and-bolt portion of an M242 Bushmaster 25mm Chain Gun to Soldiers during gunnery training at the Doña Ana Range Complex, N.M., Aug. 3, 2018.
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