Photo G3156: PBR weapons system, Forward twin .50 cal. Machine gun turret. A single M-50A1 .50 cal. machine gun was also mounted on a pedestal on the aft deck. Courtesy of SP/4 Kenneth J. Marraccini, B Company & HQ Detachment, 720th MP Battalion, 89th MP Group, 18th MP Brigade, Vietnam, October 1968-December 1969.