And like most recoiless AT weapons an impressive back blast that you could use to instantly toast any marsh mellows you had kicking around.
Wombat was 120mm 4.7 and was a fairly decent AT rifle until guided systems were introduced like Milan and the Carl Gustav 84mm anti tank rifle. ( a very impressive updated version still in use, it's a pity it wasn't that ally in the 70's-80's )
I remember seeing some land rover mounted wombats in Berlin in the mid 80's long after they had been replaced by Milan. I believe it had something to do with the expected ranges and fibua ( fighting in built up areas ), street fighting that would be expected if the soviets wanted to start a fight. AT guided missiles wouldn't work too well in the rock garden that Berlin would rapidly turn into.