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The subject of this article appears in Call of Duty: Black Ops 4 The subject of this article appeared in Zombies mode

"Refitted burst mechanism adds one bullet to each burst. Also provide additional ammo."
Create-A-Class description.

The Penta Burst is an Operator Mod for the Swordfish tactical rifle in Call of Duty: Black Ops 4. It allows the weapon to fire in five-round bursts as opposed to four, along with increasing the magazine from 36 rounds to 45.

When Pack-a-Punched in Zombies, the Swordfish equipped with the Penta Burst will fire in seven-round bursts as opposed to firing in six-round bursts that the Pack-a-Punched Swordfish normally fires.