The 17pdr SP Achilles is a British variant of the American M10 tank destroyer armed with the British Ordnance QF 17-pounder high-velocity 76.2 mm (3-inch) anti-tank gun in place of the M10's considerably less powerful 3-inch Gun M7. A total of 1,100 M10s were converted to Achilles, making it the second most numerous armoured fighting vehicle to carry the 17-pounder gun, behind the Sherman Firefly tank.

A tank destroyer, tank hunter or tank killer is a type of armoured fighting vehicle, predominantly intended for anti-tank duties. They are typically armed with a direct fire artillery gun, also known as a self-propelled anti-tank gun, or missile launcher, also called an anti-tank missile carrier. The vehicles are designed specifically to engage and destroy enemy tanks, often with limited operational capacities.