Class 5 turrets in 4.85 were renamed to class 2 due to the turret-splitting in capital ships. The Osprey can have 4 class 10 guns, 1 class 9 gun, and 2 class 2 (previously class 5) turrets.
Updated hardpoints and ship price. Though when you click "Class 2 Turrets" it still links to Class 5 Turrets page because that hasn't been changed yet.