Dudley joins in the fight with magical muggle weaponry

I read a fic a long time ago that had Vernon and Petunia killed by Death Eaters, after Dudley and Harry reconciled, and then Dudley joins Harry and uses magical weapons to fight along with the light forces. Anyone know this fic or something similar?

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(flaring this as a request because I would love any stories like this one as well )

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Thanks!