In 1955, at the QuestionMark IV conference, dedicated to the prospects of armoured vehicles development, the Americans presented absolutely killer concepts of combat vehicles - what is worth at least a tank with a nuclear propulsion system. There was also a Shush, called light infantry vehicle (light infantry vehicle). It was something.
As you can see, this thing was about 3,5-4 metres long, had an ultra-low silhouette (about 1-1,3 metres) and was armed with 106 mm M40 recoilless cannon and M1919 Browning large calibre machine gun. The engine appears to have been placed in the stern - there is no room for it anywhere else. https://shushpanzer-ru.livejournal.com/267152.html