Are you confusing it with Claws of Ahamkara? That one still grants an additional melee charge.
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[url=http://destiny.wikia.com/wiki/Sealed_Ahamkara_Grasps]Sealed Ahamkara Grasps from D1[/url] used to grant an additional melee charge plus melee damage had a chance to reload your primary. The D2 version removes half of the perk and then fleshes out what's left.
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I stand corrected.
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The claws are also a warlock exotic while the grasps are a hunter exotic.