The M1A1 HC (Heavy Common) was a modification of the American M1A1 Abrams main battle tank developed for the United States Marine Corps (USMC). Its development began in 1992, based on the M1A1 HA variant. During modernisation, the Abrams received reinforced armour incorporating second-generation depleted uranium layers, a soft-kill active protection system, improved digital engine management, and several other, less significant upgrades. The M1A1 HC was actively used by both the US Army and Marine Corps in various conflicts, including operations in Iraq and Afghanistan. A total of 880 tanks of this variant were produced, some of which remain in service with the USMC.

This special version of the M1A1 HC was introduced in the game as part of the 2025 Senrai Maidens event. Compared to the standard version, this tank features a unique exterior inspired by the character Kate, who embodies speed and fury. Otherwise, it mirrors its regular counterpart: an effective vehicle with good mobility, excellent turret protection, and powerful ammunition. It is also equipped with an electro-optical countermeasures suite that can help defend against certain ATGMs. However, the hull remains vulnerable even to early APFSDS rounds, so it is advisable to keep it concealed behind cover.