M2A5HB Browning .50cal HMG

M2A5HB Browning .50cal HMG is machine gun. The immortal Browning .50 caliber machinegun still rules the battlefield of heavy machineguns, with its relatively light ammunition mass, proven reliability, massive hitting power, and the huge ammo supply still in stock. The A5 model is lighter than its predecessors, built with plasti-cerimets and composites rather than the old-fashioned steel used in previous models-it only weighs 20 kilograms, a real improvement over the 36+ kg of former makes. With a power exo-mount, a normal soldier can carry and fire an M2 on the move.

Source

 * Home of the Brave, pg.85
 * Blackhand's Street Weapons, pg.33