How can i attach gun to hands In the menu

Hi,How can i attach gun to hands In the menu ? and Why does my hero have to be the parent of the gun?

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Hi, in the viewport select your GUN_SR01_01, then set the “Parent Socket”

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The parent is the object your gun will be attached to. Therefore if you want to attach the gun to the hero, the hero will be the parent.

Thank you very much