Though some players have reported the challenge required to unlock it being bugged, the powerful Streetsweeper shotgun is available to unlock via Call of Duty: Warzone and Call of Duty: Black Ops Cold War. The shotgun seems like it's going to decimate enemy players, and the challenge to unlock it is actually pretty easy to unlock.
How to unlock the Streetsweeper
Unlocking the Streetsweeper shotgun requires getting a three-kill streak using Black Ops Cold War shotguns at least 15 times. This means that any shotgun in Black Ops Cold War is eligible for the challenge, along with those same shotguns within Warzone. You can only do this once per match, however, so getting repeated kill-streaks in the same match won't add to your total. Warzone matches are also eligible if you don't play Black Ops Cold War.
You can also get a special version of the weapon called the Surge Protector as part of the Shock Value pack for 1,200 Call of Duty Points. If you go this route, that variant will be available instantly without having to complete the challenge. The pack also includes a legendary charm, legendary emblem, and epic sticker.
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