Keywords: US Navy 071102-N-6040A-001 Sailors learn the proper technique on the use of an M4 rifle as part of the Expeditionary Combat Skills course at the Navy Construction Battalion Center.jpg en GULFPORT Miss Nov 2 2007 - Sailors learn the proper technique on the use of an M4 rifle as part of the Expeditionary Combat Skills course at the Navy Construction Battalion Center U S Navy photo by Lt j g Alphonso Jefferson Jr RELEASED 2007-11-02 071102-N-6040A-001 Navy http //www navy mil/view_image asp id 52465 U S Navy photo by Lt j g Alphonso Jefferson Jr PD-USGov-Military-Navy Naval Construction Battalion Center Gulfport Males with M4 carbine |