 From Casino Royale to From Russia , with Love Bond 's preferred weapon is a .25 ACP Beretta automatic pistol carried in a light @-@ weight chamois leather holster . However Fleming was contacted by a Bond enthusiast and gun expert , Geoffrey Boothroyd , who criticised Fleming 's choice of firearm for Bond and suggested a Walther PPK 7.65mm instead . Fleming used the suggestion in Dr. No , also taking advice that it should be used with the Berns @-@ Martin triple draw shoulder holster . By way of thanks , the Secret Service Armourer who gives Bond his gun was given the name Major Boothroyd , and is introduced by M as " the greatest small @-@ arms expert in the world " . 
