can operate in temperatures between −40 °C and +55 °C and has an increased road speed of 75 km/h. As a result of all these changes the vehicle is now higher—3,085 m (the second variant is 2,895 m) and heavier—16.6 tonnes (the second variant weighs 16.8 tonnes). There are also additional improvements which can be carried out at customer's request. Those include adding kevlar-type spall liner to improve vehicle's protection, navigation system for improving tactical mobility and air conditioning system for improving crew comfort and allowing easier operation in hot climate. Operators Current operators – 100 ordered in 1963 from the Soviet Union and delivered between 1965 and 1966. 560 ordered in 1979 from the Soviet Union and delivered between 1979 and 1988 (the vehicles were previously in Soviet service). – 200 BTR-50s and 150 Type 77s. – 130 BTR-50s' ordered in 1977 from the Soviet Union and delivered between 1978 and 1979 (the vehicles were previously in Soviet service). Currently 30 BTR-50s and OT-62 TOPASes are in service. – 92 were ordered in 1975 from the Soviet Union and delivered in 1975 (the vehicles were previously in Soviet service). – 200 - Currently 3 are in service. – 500 were ordered in 1964 from the Soviet Union and delivered between 1965 and 1966 (the vehicles were possibly previously in Soviet service). 250 BTR-50PKs are currently in service. On 12 July 2014, 500 BTR-50s were upgraded to BTR-50PKM standard with UTD-201S diesel engine and includes a new set of day and night sensors. – 10 were ordered in 1981 from the Soviet Union and delivered in 1982 (the vehicles were second-hand). – 200 ordered in 1977 from the Soviet Union and delivered between 1978 and 1979. – 66 BTR-50P/PM/PU were ordered in 1963 from the Soviet Union and delivered in 1963–1965. 34 BTR-50PK were ordered in 1997 from Ukraine and delivered in 1997–1999. Currently ~70 are in service. – 270 were ordered in 1966 from the Soviet Union along with 300 BTR-60Ps as a $110 deal and delivered between 1967 and 1968. 300 BTR-50s and BTR-60s in service in 2000, 2002, 2005 and 2008. An estimated 1000 is storage. Iran has its own upgraded BTR-50 variant, the Makran IFV. Over 150 BTR-50s are currently in service, with hundreds in storage, per GlobalSecurity. – 300 BTR-50s and BTR-60s in service in 2000, 2002 and 2005. – 8 purchased in 1987 from