Both of them were available on the Season 3 Battle Pass for free, but starting with Season 4, they are only unlockable through buying store bundles with them or through unlock challenges. These two weapons are available to everyone who plays through Black Ops multiplayer and Warzone battle royale matches. The launch of Season 3 included the PPSh-41 and Swiss K31, the former which players will recognize from World War II-era games. The Cold War was a long encompassing period of time, so it’s natural that a variety of weapons from across several decades are appearing in the arsenal of Call of Duty: Black Ops Cold War and Warzone.
