“Soon after the Centurion’s introduction, Royal Ordnance finished work on the 84 mm calibre Ordnance QF 20 pounder tank gun. By this point, the usefulness of the 20 mm Polsten had been called into question, it being unnecessarily large for use against troops, so it was replaced with a Besa machine gun in a completely cast turret.”
Just because the A 20mm variant isnt ingame, does not mean the B variant is “fake”. It being first in service doesnt interrupt things from my knowledge. Both were built. The Polsten variant is suggested, so you can support it if you want.
And next time, please post in the correct area, that being Machinery of War. Thanks