Funeral for an Assassin (1977)

Ex-professional contract killer is framed and betrayed so he ends up in prison. It would be no such a huge surprise because bad guys do bad things, but his last employer was the South African government. His revenge will be brutal - killing all of the South Africa's most important politicians.

It's always refreshing seeing corrupt politicians through the sniper lens. This is one of the Treeline/Reelmedia Action Classics, originally made in 1977. Starring Vic Morrow as Michael Cardiff and Ivan Hall directed it.

No major distributor has released it. This film seems to be in the public domain, which means any distributor can legally sell copies without paying royalties.