The company name "Cyrez" was originally "Cyrex", but the real-life company Cyrix complained. The movie had been shot, but all dialogue was dubbed and company logos were digitally altered during postproduction.
The shot outside of the gay bar in DC showing the US Capitol Building was actually taken outside of the Phoenix Park Hotel on North Capitol St. in DC. The front of the hotel was covered in purple and the "AC/DC" fictitious bar name prominently displayed.
No. Eraser is based on a screenplay written by Tony Puryear, Walon Green, and Michael S. Chernuchin.
What does the title mean?
In the movie, an 'Eraser' refers to a witness protection agent who 'erases' a person's past life and sets them up with a new identity.
What is a 'rail gun'?
Lee explains that a railgun is a secret electromagnetic pulse rifle that doesn't use gunpowder or bullets but fires aluminum rounds at extremely high speed. According to Lee, Cyrez was contracted to scale it down to make an assault rifle, the most powerful assault rifle on Earth.