Doomsday Gun

Doomsday Gun is a 1994 television film produced by HBO, dramatizing the life of Canadian supergun designer Dr. Gerald Bull and his involvement in Project Babylon, Saddam Husseins plan to build a supergun with a range of over 500 miles.

After his release, Bull promotes his supergun idea to Saddam Hussein, and, with funding through BCCI, begins design work on the top secret project, Babylon. Bull solves several manufacturing challenges by forging and assembling it in sections which are bolted together by flanges, and lining the relatively soft barrel material with an alloy sleeve to reduce wear on the barrel. British and U.S. government agencies are shown to be aware of Bulls activities, but do nothing to stop him. The Israeli Mossad tries to dissuade Bull, and goes so far as to threaten his life, with no effect.As the Baby Babylon version of the gun is assembled and tested successfully horizontally in Iraq, Bulls second in command, Cowley, quits after a roadside runin with Mossad agent Dov, who also shadowed Bull. The Iraqis demand an additional, 45degree, test of the prototype gun, using threats to coerce Bull into compliance. That completed test firing results in a direct hit on a target 100 miles away, and Bull brags that the full size Babylon gun can fire ten times as far. ........

Source: Wikipedia