Why isn't a team starter pack working?

local plr=game.Players.LocalPlayer
if plr.Team=="Blue" then 
    game.Lighting.M4:Clone().Parent=plr.Backpack
    print("It's working")
end

As the title says, when I launch the game up to test, it doesn't work, doesn't show any errors, or prints anything. Am I supposed to use a service in my script? Since after all, a Team is a property of a Player, and this is a local script.