How to Hide a Model on the player but show when dropped?

[InfernalCookie]

How would I make it so the Model of a SWEP is hidden while he his holding it, but on the function OnDrop it reveals the model again?

I thought about using function DrawWorldModel() return false end but I don't know how I would make it return true OnDrop :S

[Chessnut]

Entity:SetNoDraw(bool)

[InfernalCookie]

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