It should have the capability to carry a single 500lb bomb in AH, IIRC. This is historically correct for any 'universal' winged Spitfire, such as the F.Mk IX in AH.
The 250lb bombs under each wing could only be carried on 'e' wing Spitfires such as later Mk IXs and the Mk XVI. No Merlin 61 Spitfire Mk IX, like the one in AH, ever had the 'e' wing.