It was added to the Mystery Box and Trials rewards pool as part of the Season Three: Reloaded update. The MAC-10 can be brought into any map via Create-A-Class, at Loadout rarity. It was added as part of the Season One content for the game. The MAC-10 returns in Call of Duty: Black Ops Cold War. Improved handling speeds with reduced damage.' - In-game description

Fastest fire rate in class with higher vertical recoil. Sm_t9fastfire (Warzone) ' Full-auto submachine gun. Its only competitors are the M1014 at close range, and the M40A3 and Dragunov at long range. It is very useful on all maps, due to its high rate of fire and excellent accuracy when aiming down the sights. The MAC-10 has a 40-round magazine but less backup magazines. In the campaign, the MAC-10 has a 30 round stick mag the MAC-10 is used quite often by enemy forces in the SAS missions, but it is not found in USMC missions until ' Missile Away'. The MAC-10 holds 40 rounds in multiplayer and 30 round in singleplayer, and has an extremely high rate of fire but lacks in stopping power, taking several shots to take down a single enemy, though it is compensated for by the viciously high rate of fire. Along with all other weapons in the game, the MAC-10 has no recoil and idle sway when aiming down the sights.

The MAC-10 is one of the three SMGs available in Call of Duty 4: Modern Warfare (Nintendo DS), with the other two being the MP5 and the Mini-Uzi.

Mac 10 9mm loading tool