Unfortunately, due to its obscure status, The Killer (2006) is available on legal streaming giants like Netflix, Prime Video, or Disney+ Hotstar. The rights are likely held by a defunct studio (Shree Ashtavinayak).
If you truly want to watch Andre Refig punch his way through the Russian mafia, do it the right way: the killer 2006 filmyzilla exclusive
was considered a box office flop at the time of its release on July 21, 2006. Unfortunately, due to its obscure status, The Killer