The music in Meet the Sniper is a rearrangement of, or reference to, the Magnum Force theme music by Lalo Schifrin.
The Sniper drives a 1965 Land Rover Series I Camper Van, a hint to his game style.
The snipers quote about being polite, professional, and having a plan to kill everyone you meet was spoken by U.S. Marine Major General James Mattis to his troops in Iraq.