Outer Casing of Armour Steel 8. The ball of uranium is inserted into the interior of the aluminum sphere in such a way that the opening on it fits opposite the opening in the aluminum. The blocks with the lenses are stacked on the outer surface of the aluminum except for one block which is placed over the opening in the aluminum. The lenses are mounted on the duralumin shell, to which the blasting device is also fastened. In that form the bomb is ready for transportation to the place of use.
Further assembly is carried out as follows.
The initiator is inserted into the interior of the tamper. The plugs are put into place, after which the last block of explosive is superimposed and the openings on the duralumin and steel shells are closed.