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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
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"Firing blowback system shoots each other bullet at an increased fire rate."
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The Echo Fire is an Operator Mod featured in Call of Duty: Black Ops 4. It is only available for the Maddox RFB and allows for every second shot to be fired at an increased fire rate.

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