Comparing: AT 8 vs. Achilles

The vehicle was conceived as a breakthrough tank. The design project evolved from the AT-7 project, and both projects were submitted at the same time. No prototypes were built because the A39 Tortoise was preferred.

The Achilles was a British variant of the American M10 GMC tank destroyer. Standard M10 gun was replaced by a more powerful British anti-tank Ordnance Quick-Firing 17-pounder gun. That allowed the tank destroyer to effectively battle against the German vehicles. In 1944 the re-equipping of the tank destroyer was launched, with a total of 1,100 vehicles re-equipped by the end of the war.