He probably got that Chinese rifle from one of his Vietnamese General buddies, when he was over in Paris negotiating on their behalf.
Or the North Vietnamese Army gave it to Kerry as a gift for negotiating the POW MIA crisis
settleing it in their favor and thereby securing a nice real estate deal for Kerry's Forbes cousin
Never mind John F Kerry did this while our POW MIAs were being tortured right under his nose as he was wined and dined by our most vile enemies...