The answer is on Brtish bombers of WW2 they had a collar fitted round the mid upper turret called a gun deflector blister which deflected the gunbarrels over the tail plane and the Navigators dome at the front, postwar aircraft that had electric turrets had an electrical cut out fitted , there was a insulated outline of the tail ect on a drum that did the same thing except it didn't deflect the guns just stopped the guns firing.
