Ian Fleming made James Bond's weapon of choice a 'lady's gun.' He changed it once a fan wrote to him.
The Beretta 418 pistol was James Bond’s gun of choice until a fan wrote Ian Fleming a letter saying it was a lady’s gun. The Beretta M418 is a 6.35 mm Italian 'pocket pistol,' which was first introduced between 1919 and 1922. It's so small you can fit it in the palm of your hand. While the fan said it was a lady's gun, it was actually pretty popular among high ranking Italian officers during World War II. However, due to the size, it's really underpowered for real combat.
It was a relatively popular gun and Ian Fleming, the author of the James Bond series, originally had it as Bond’s gun of choice. Fleming stuck with the gun for some time until the Dr. No movie was to be released and he received a letter from a fan criticizing its use. The fan said the Beretta was 'a lady’s gun' and suggested the Walther PPK as a replacement. Fleming liked the man’s suggestion. The way he did it was he wrote a character in called Major Boothroyd, who was 'the greatest small-arms expert in the world' and insisted Bond replace his gun with the Walther PPK.