M36 Slugger

The M36, aka the slugger, was an American tank destroyer in service with the US army during WWII. It was notorious for its powerful 90mm cannon.

IRL

The M36 was first a planned replacement for the M10, which was determined to be rapidly entering obsolescence. To address this issue, a new vehicle was conceived armed with the M1 90mm AT gun upon a modified M10 chassis. In typical tradition, a Browning M2 MG was strapped to the top to shred infantry and aircraft. Some versions had a standard .30 cal Browning MG due to some Slugger's being built out of reclaimed Sherman chassis. In tradition with American Tank Destroyers, the Slugger had a relatively high speed to fit American Tank Destroyer doctrine.

Due to logistics, equipment prioritization, and no pressing need, the Slugger was delayed from entering Europe until 1944, when it would become a substantial boost to allied morale. The Slugger was more than capable of sniping any Fascist tank from a reasonable distance, being armed with a cannon larger than even the Tiger. It could deal with Panthers, Tigers, and Kingtigers with reasonable efficiency.

Post war, the United States shipped the things to allied and other countries for use in their own militaries. In Korea, the last war where it was fielded by the US, it scored an impressive tally of kills due to the godless communists wrongly thinking their puny tanks stood a chance versus 9cm of supersonic death.