After the establishment of the Israeli State in 1948, the IDF faced numerous conflicts with various nations, and needed a cheap way to create a capable armoured force. Various modifications of the M4 Sherman had been supplied from France in the 1950s, but these were rather outdated by this point. Thus, the M-50 was developed, combining the chassis of the M4A1 and a 76 mm cannon. However, this proved inadequate against more modern tanks like the T-54/55 that appeared in subsequent years. Consequently, the M-51 was developed, equipped with a 105 mm rifled cannon (the same used by the AMX-30). The tank saw action during the Yom Kippur War alongside Centurions and Patton tanks. The M-51, with its HEAT shell, proved more capable against the T-55 and T-62's armour; however, it suffered from poor engine reliability, mediocre off-road mobility, and minimal protection against enemy tanks, ATGMs, or RPGs. Eventually, the tanks were sold to Chile, where they became known as the M-60.

The M-51, introduced in Update "Wind of Change", boasts a powerful 105 mm cannon; however, unlike other Shermans, it lacks a stabiliser. Its HEAT shell is powerful enough to penetrate virtually every enemy at its BR, even the Maus. However, this is balanced by limited mobility and extremely weak armour; most times, the vehicle will be destroyed from a single hit. Moreover, its off-road mobility and reverse speed are subpar for its BR, even when compared to heavy tanks. Therefore, it excels in ambushes or a defensive playstyle. Rushing and remaining on the frontlines is ill-advised; instead, adopt a cautious approach and utilise the cover provided by your teammates.