Master at Arms 3rd Class Jerald Johnson fires the M240 Bravo machine gun during weapons sustainment training Jan. 9, 2016, at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

Participants of weapons sustainment training ask questions during the safety brief Jan. 9, 2016, at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

Master at Arms 2nd Class Winston Hardison counts 7.62mm rounds during weapons sustainment training Jan. 9, 2016, at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

Sailors participating in weapons sustainment training sign in to ensure full credit for the course Jan. 9, 2016, at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

A sailor ensures a M240 Bravo machine gun is lubricated during weapons sustainment training Jan. 9, 2016 at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

A sailor collects empty shell casings during a weapons sustainment training Jan. 9, 2016 at Joint Base Charleston, S.C .The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)

Master at Arms 1st Class Chase Ferguson shows basic weapon handling procedures to participants of weapons sustainment training Jan. 9, 2016, at Joint Base Charleston, S.C. The two day, semi-annual training event was hosted by the Coastal Riverine Squadron 10 Bravo Company, a Navy Reserve team stationed at Joint Base Charleston – Weapons Station. The participants were required to show proficiency and familiarization with the M240B machine gun. (U.S Air Force Photo/Staff Sgt. Jared Trimarchi)