FBMk3 & 5= 4x20mm cannon/2x500lb bombs or mines or unknown number of 3" or 5" RPs or 2x90gal drop tanks.
FGA MK4 & 6= 4x20mm cannon/ up to 20x3" or 5" RPs or 4x500lb bombs or 4x90gal drop tanks. One assumes 4x500lb mines could have been carried in place of bombs.
Note: German Navy Seahawks when fitted with Ecko radar might also have carried up to 3x90 gall drop tanks.
Royal Netherlands Navy F Mk50 also carried 2xSidewinder AAGM
No punch FRU Seahawks had a light fitted in the front of one of the two 90 gall drop tanks.