G-3 Light Tank Destroyer

Due to its lengthy and late start development(1941-1942), this project was already completely obsolete before even entering production. Its bulletproof armor and, above all, its 37mm anti-tank gun, made it no match for competitors like the T49 with its 75mm gun (which would later become the M18 Hellcat). Despite an interesting Christie suspension and an impressive supposedly top speed (97 km/h), it would have been no match for the Panzers. Ultimately, none were ever built.