The M2 Machine Gun or Browning .50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning. It uses the large and powerful 12,7mm round known as .50 BMG cartridge, which was developed alongside and takes its name from the gun itself (BMG standing for Browning Machine Gun). It has been referred to as "Ma Deuce", in reference to its M2 nomenclature. The design has had many specific designations; the official designation for the current infantry type is Browning Machine Gun, Cal. .50, M2, HB, Flexible.
It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications and low-flying aircraft.
Team Pussycat uses the M2 machine guns for defending their bases against possible infiltrations and as a ground vehicles' weapon. Its size and weight exclude using it as a portable weapon since only Stan and Ian have enough strength to wield it in combat.
The Comintern use the Soviet-made equivalents of Browning M2 - the DShK and the NSV heavy machine guns.