I'm sure this is an old request but it is an easy one and historically accurate.
My request is a broader selection of guns for the Spitfire. The reason being is that from 1942 on the majority of Spitfires coming off the line had the C Type wing which allowed for four .303 machine guns and two 20mm cannons or two .50cal guns and two cannons, OR four 20mm cannons. There is no reason the VIII or the IX should be limited to the peashooters mixed in with the cannons.
This post is incorrect.
The universal wing could not load two 20mm cannons and two .50 caliber machine guns. No Merlin 61 or Merlin 63 Spitfire Mk IX ever had .50 caliber machine guns and the AH Spitfire Mk IX has a Merlin 61. I am unaware of any e wing Spitfire Mk VIIIs, and if that is correct no Spitfire Mk VIII ever had .50 caliber guns either.
WWII Spitfire wing types:
a wing: Eight .303s, Spitfire Mk Is, Mk IIs and a small number of Mk Vs had this wing.
b wing: Four .303s and two Hispano Mk Is, most early Spitfire Mk Vs had this wing and the Spitfire Mk V in AH has it (The Spitfire Mk Ib and Mk IIb were unsuccessful emergency attempts to get cannons into the BoB by mounting a single Hispano Mk I in each wing, but mounted on its side there were severe jamming issues)
universal wing: modular wing that could have eight .303s or four .303s and two Hispano Mk IIs or four Hispano Mk IIs, introduced in later Mk Vs and widely used on Spitfire Mk VIIs, Mk VIIIs, Mk IXs, Mk XIIs and the first few Mk XIVs. In practice the wing always carried four .303s and two Hispano Mk IIs. I have never seen a photo of one of those Spitfires with eight .303s. The only cases I know of that deviate from that armament are two squadrons of Spitfire Mk Vs being used for ground attack in the Mediterranean Theater and one or two Spitfire Mk VIIIs used by the RAAF in the Pacific Theater for the express purpose of shooting down the high flying and very fast Ki-46 photo reconnaissance planes of the IJAAF. The use in the Mk VIIIs has puzzled me as one of the main reasons the four Hispano Mk II option wasn't often used was that the outer cannons froze at altitude due to inadequate heating.
e wing: Two .50s and two Hispano Mk II cannons. Introduced on late Spitfire Mk IXs (Merlin 66 or Merlin 70) and also carried by almost all Spitfire Mk XIVs and all Spitfire Mk XVIs.
The Spitfire F.21 introduced a completely redesigned wing which had four Hispano Mk Vs and all subsequent Spitfires and Seafires had that wing and armament.
The Spitfires in AH are just fine armed as they are. The eight .303s would only be used as a joke and the four 20mm would be abused by the playerbase.