Holding two swappable weapons

Hello everyone.
I this probably is a resource already, but if it is I can't find it...I want my player to hold two weapons, a primary and a secondary, and when the player looks at an item on the ground, he can swap it out for whatever weapon he's already holding. For the looking at an item part I have the interactive crosshair resource installed, but everything else I need help with. Can someone help me out or point me in the right direction?
Thanks, help is appreciated.