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"Refitted burst mechanism adds one bullet to each burst. Also provide additional ammo."
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Penta Burst Operator Mod Icon BO4
Penta Burst
Unlocked Weapon level 15 (MP)
Weapon level 17 (ZM)

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.