As part of Call of Duty Black Ops Cold War and Warzone Season 5, the C58 is now available through a suite of challenges.
Here's how to unlock the new weapon.
To unlock the C58, you must make one Long Shot kill in 15 different games, using assault rifles.
To accomplish this challenge, we strongly recommend that you do it on the larger maps of Black Ops Cold War, while equipping your favoured assault rifle with a x3 or x6 precision scope -- naturally depending on your accuracy.
The Satellite maps is particularly good for completing this challenge, as is Crossroads.
On Warzone, we advise you to take a tour of Rebirth Island or play Plunder mode to ease the pressure on this challenge. Verdansk is a fairly large map, so with a little precision and good optics, you shouldn't have too much trouble.
The challenge is the same whether you're playing Warzone or Black Ops Cold War, so just go with whichever you are most comfortable.
