My interpretation of what little is known about the FW 190A-10.
"Late in the war, the A-10 was fitted with larger wings for better maneuverability at higher altitudes, which could have allowed additional 30 mm (1.18 in) calibre, long-barreled MK 103 cannon to be fitted."
This is shown in aluminum with Hermann Graf markings ( "flames" ).
30mm Mk 103s with muzzle brakes on the inner wing stations. 13mm cowl guns now 20mm MG-FF-M. While this particularly fighter would lack any fast-firing guns, the entire purpose of its existence is to target large bombers and hammer them with HE rounds.