ITEM.Name = 'Model-Name'
ITEM.Price = Price
ITEM.Model = 'modelpath'

function ITEM:OnEquip(ply, modifications)
if not ply._OldModel then
ply._OldModel = ply:GetModel()
end

timer.Simple(1, function() ply:SetModel(self.Model) end)
end

function ITEM:OnHolster(ply)
if ply._OldModel then
ply:SetModel(ply._OldModel)
end
end

function ITEM:PlayerSetModel(ply)
ply:SetModel(self.Model)
end