 The new barrel was made of steel alloy with chrome and nickel with excellent mechanical resistance to pressure which allowed, after modifying the firing brake, the recovery arch and the sighting devices an increase of the range from 8.5 km to 11.2 km and a rate of fire of 20 rounds/minute.During World War 2 these guns also used Costinescu 75 mm anti-tank round.These upgraded field guns were used in all infantry divisions in World War II.