As readers of The Walking Dead comic, and players/owners of The Walking Dead: All Out War expansion Made To Suffer know, there is an episode involving the use of a US Bradley Infantry Fighting Vehicle.
The expansion has a two dimensional card representation that you can use, but as most people are using 3D terrain, what is available?
Empress Miniatures do a range of 1/50 scale armoured vehicles, which includes the M2/M3 Bradley.
I do not own one, but I do own one of their similarly sized British Warrior Mechanised Combat Vehicles (aka MCV-80 or FV-510).
It is an imposing sight on the table, but is a lot smaller than the cardboard one.
I did measure the card one and it is close to 1/35 scale.