It wouldn't be a bad idea if the perk was situational, but it's basically just a flat damage buff. There's no reason not to have it active. It's not only that it's overpowered, it also just makes no sense.
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Problem is, that it [i]Used[/i] to be situational. You had to get a kill before you could use it.
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Should have been something like " landing a full burst on a targer activates the perk for the magazine until the next reload" Or something like that...idk.