Naval Mobile Construction Battalion 133 Seabees begin to disassemble the M4 carbine during the weapons familiarization portion of the command Black Hell Squad competition. During this station, Seabees were required to disassemble then reassemble the M9 pistol, M4 carbine, and an M240 machine gun.

Photo by: Cliff Williams |  VIRIN: 151005-N-EW956-012.jpg