Boothroyd wrote a letter to Fleming stating his admiration for the Bond character but not his choice of weapons, being that Bond's default weapon at the time was a Beretta 418. In response to the letter, Fleming had 007's default weapon switched from the Beretta 418 to the Walther PPK in his sixth novel, Dr. No. Boothroyd also suggested 007 attaching a silencer to the weapon that is also used by other characters. This was in response into Fleming's first impression of the suggested weapon being dull and uninteresting. Fleming then created the character Major Boothroyd, who's occupation is stated as an armourer.
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