Bungalow or Kv-7 as its known in real life was a soviet prototype built on the Kv-1 chassi. The reason for its weird configuration of 3 guns was because of the weak 76.2mm L-11 that was featured on the early Kv-1 tanks. The 2 45mms would be there to make up for the 76.2mms shortcomings. During testing it showed that it was almost impossible to fire 3 guns during engagements, thats why the project was later cancelled in spring of 1942.