U.S. Marine Corps photo by Lance Cpl. Tyler C. Vernaza/Released 110622-M-0000H-003.jpg
Jun 22, 2011
Marines use rifle combat-optic sights attached to their M16A4 and M4 service rifles to practice range estimations during a Combat Hunter course at Camp Hansen June 22. The week-long course is designed to improve identification and observation skills.
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