he BTR-50 is a Soviet amphibious armoured personnel carrier based on the PT-76 amphibious light tank chassis. The BTR-50 was tracked, unlike most members of the BTR series, which were wheeled. Like the PT-76, the BTR-50 has a flat, boat-shaped hull. Unlike the PT-76 it has a new superstructure added to the front of the vehicle. The engine used in the BTR-50 is the V-6 6-cylinder water-cooled diesel engine developing 240 hp (179 kW) at 1800 rpm gives it a road speed of 44 km/h with a cruising range of 400 km BTR-50PK is armed with a pintle-mounted 7.62 mm SGMB medium machine gun. This variant has an NBC protection system.