Air Force Staff Sgt. Robert Wilson, A security forces airman with 11th Security Forces Squadron, engages distant targets with an M240B medium machine gun during predeployment qualification excersise at Range 5 on March 4. The M240B provides superior firepower to units across the U.S. armed forces. - Air Force Staff Sgt. Robert Wilson, A security forces airman with 11th Security Forces Squadron, engages distant targets with an M240B medium machine gun during predeployment qualification excersise at Range 5 on March 4. The M240B provides superior firepower to units across the U.S. armed forces.