Artistic License – Physics: a 95% efficient solar cell is still way outside the reach of science, even decades after this movie was made. To put things in perspective, early 21st century solar cells achieve around 25% efficiency. Assuming the technology was released in the Bond universe after the events of this movie, it would have, as stated in the movie, ended the energy crisis, but to such an extent that it would have put every other kind of energy out of business practically overnight.
Blooper: Saida's mirror gets pushed out of alignment during a fight scene, bringing the camera crew into view.
After being behind several well done Bond movies including Goldfinger, the tepid reaction to this movie ensured Guy Hamilton wouldn't be involved with another Bond movie, and he did not quite enjoy the success he once had (Golden Gun is one of only two films in the Bond canon that actually killed a non-actor's career; Die Another Day is the other).
It was also the last film Harry Saltzman was involved in before he dropped out of the series; Saltzman only oversaw two more films past Golden Gun before he died.
Fake Nationality: Marne Maitland, who played the Portuguese Mr. Lazar, was Anglo-Indian.
Fountain of Expies: Scaramanga ranks with Goldfinger and Blofeld as one of the most recognizable of all Bond villains.
Star-Making Role: Herve Vilechaize's role as Nick Nack made him famous. In fact, prior to this movie, Villechaize was so poor that he was living out of his car in Los Angeles!
Unintentional Period Piece: Besides its '70s fashion, the film dates itself with its extensive talk about the energy crisis, and MI6's use of the wreck of the Queen Elizabeth as covert headquarters. note Declared a shipping hazard and dismantled for scrap between 1974 and 1975, with the unsalvageable remains of the hull being blasted and now completely submerged on the seabed The martial arts school also points itself to the Kung Fu craze of the 70s.