Mastercraft Variant of the GKS is the Tactical Unicorn
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YouTuber HollowPoint has unlocked the Mastercraft Variant of the GKS weapon in Call of Duty: Black Ops 4, and it appears to be one of the most interesting designed weapons in the game.
Based on the video, the variant is called the Tactical Unicorn — and yes, you guessed it, it has a unicorn style look to the weapon.
Mastercraft variants of weapons in Black Ops 4 are unlocked by completing challenges while using the Signature weapon of each of the different weapons in the game.