How to set values on players serverside?

when a player in my game clicks a button in a menu in my game it sets a string value on the player to the equipped value of the button i named the value eq like if the player equips the color blue the value will be set to Blue. however its in a local script and only sets it client side. but if i change it to a regular script it dosent work at all and my game script reads the players eq value on the server side to give them the blue weapon.

Script on button:

local player = game.Players.LocalPlayer
script.Parent.MouseButton1Click:Connect(function()
    if player.Shop.Red.Value == true then
    player.eq.Value = "Red"
    end
end)

Code in game script:

for _, player in pairs (game.Players:GetPlayers()) do
                        if player.eq.Value == "Red" then
            local primary = game.ReplicatedStorage.Red 
            local newprimary = primary:Clone()
            newprimary.Parent = player.Backpack
            end
            if player.eq.Value == "Yellow" then
            local primary = game.ReplicatedStorage.Yellow  
            local newprimary = primary:Clone()
            newprimary.Parent = player.Backpack
            end
            if player.eq.Value == "Blue" then
            local primary = game.ReplicatedStorage.Blue  
            local newprimary = primary:Clone()
            newprimary.Parent = player.Backpack
            end
            if player.eq.Value == "Green" then
            local primary = game.ReplicatedStorage.Green  
            local newprimary = primary:Clone()
            newprimary.Parent = player.Backpack
            end
            if player.eq.Value == "None" then
            local primary = game.ReplicatedStorage.Sword  
            local newprimary = primary:Clone()
            newprimary.Parent = player.Backpack
            end             
        end