The T48 and M48(Mod A) tanks featured a remote controllable machine gun mount as the tank commander's weapon on a pedestal, which allowed him to fire the .50 caliber (12.7mm) M2HB machine gun from within the vehicle's turret. It used a 100-round ammunition box and could also be employed manually by the commander. However, servicing and reloading of the weapon required the tank commander to open his roof hatch and expose his head and upper torso. This remote controllable mount was designated as the .50 Caliber Machine Gun Mount, M1 and designed by Chrysler Defense Engineering.