Hey,,,
From what I’ve found these are 122mm and 240mm,,,
The last I read Seoul is about 25 miles from the DMZ,,,
Neither one will reach,,,
What they will do is breach the DMZ and forces south,,,
One report said NK could keep up a 10,000 rpm rate of fire
for a day or so,,,
Watch for iron on the move...
Source. South Korean newspapers.