The M4A3E2 (76) W Sherman - Assault Tank, also known as the "Jumbo", is a special up-gunned and armoured modification of the M4A3, which is the fourth variant of the early-generation Medium Tank M4 (Sherman) family. Approximately 100 M4A3E2s were up-gunned to 76 mm M1 tank guns in February 1945, using supplies salvaged from knocked-out late-generation M4 Shermans and standard supply stocks. Since the M4A3E2 gun mount was originally designed for the 76 mm M1 tank gun, this upgrade was a relatively simple field upgrade. The reorganization of the main tank gun ammunition stowage was the most difficult part of the upgrade. This necessitated the removal of the turret as well as the installation of 76 mm ammunition racks in place of the shorter 75 mm ammunition racks. These replacement racks were then held in place by a series of custom-made welded bracing. According to records, such a modification required around 75 hours per tank. It should be emphasized that the term 'Jumbo' does not exist in any military material and is probably certainly a post-war nickname, possibly developed by a model organization.

Introduced in Update 1.45 "Steel Generals", the M4A3E2 (76) W improves on the previous M4A3E2, which was based on the original M4A3 Sherman variant. The M4A3E2 (76) W finally gives players the much-needed improvement in armour penetration, allowing it to deal with adversaries from the front considerably more easily. However, due to the increased battle rating of the M4A3E2 (76) W and the abundance of even stronger opponents, the tank's frontal armour protection is no longer as effective as it was with the preceding M4A3E2. Due to considerable advancements in firepower, enemies at this rank may frequently penetrate the M4A2E2 (76) W from the front with ease. Nonetheless, this is a significant and welcome firepower improvement that is critical for the M4A3E2 (76) W. Players must be more cautious throughout battle as adversaries' weaponry becomes increasingly powerful.