Player:GetInfo returning string with newline/Player:Give not working?

[MaximLaHaxim]

The following code doesn't work:

function Ply:SpawnForRound()
	self:StripWeapons()
	self:SetTeam( autobalance.TeamWithLowestPlayers() )
	self:Spawn()
	self:SetModel( self:TeamToModel() )
	self:Give( "weapon_battle_p226" )
	
	local weapon = self:GetInfo( "battle_primary_weapon" )
	self:Give( weapon )
	
	local col = team.GetColor( self:Team() )
	self:SetPlayerColor( Vector( col.r/255.0, col.g/255.0, col.b/255.0 ) )
end

The console says this (your typical NULL Ent messages)

Attempted to create unknown entity type !
NULL Ent in GiveNamedItem!

This is where I'm declaring "battle_primary_weapon" (clientside, of course)

CreateClientConVar( "battle_primary_weapon", "weapon_battle_famasg4", true, true )
	
cvars.AddChangeCallback( "battle_primary_weapon", function( convar, oldval, newval )
	if not table.HasValue( GAMEMODE.AllWeapons, newval ) then
		RunConsoleCommand( convar, oldval )
	end
end )

I assumed that a newline was being created, and this is further supported by a newline being shown in the console when I print the value. What should I do to fix this?