Complex sentence: The Royal Army of Oman Scorpions replaced the Saladin armoured car between 30 and 50 vehicles were delivered between 1982 and 1983, plus three Samson armoured recovery vehicles.
Split into simpler sentences: The Royal Army of Oman Scorpions replaced the Saladin armoured car with between 30 and 50 Scorpions. They were delivered between 1982 and 1983, with three Samson armoured recovery vehicles.