U.S. Navy Construction Mechanic 2nd Class Brent Rensink, foreground, with Naval Mobile Construction Battalion (NMCB) 25, fires an M4 carbine during Naval Construction Group 2's M4/M16 qualification course in Woolmarket, Miss., Feb. 11, 2014. NMCB-25 performed weapons qualifications in preparation for a scheduled deployment in support of Operation Enduring Freedom.