both the 4x20mm and rocket pods saw limited use. But they were used more then enough to "qualify". The russians actually flw the A-20 more then any allied nation and it was configured with a bunch of options. It carried 2 x torpedo with the bombbay closed and additional fuel tank there. The ground attack ones had 4 x 20mm (russian make) as well as rocket options (no clue if this was in addition or in place of wing bombs)...
