 Major Boothroyd, the MI6 armorer and "the greatest small-arms expert in the world" in M's opinion, insists that Bond trade it for a weapon with more stopping power.Bond is issued a 7.65mm Walther PPK , and a Smith & Wesson Centennial Airweight revolver for situations where he needs more power than the PPK can offer.He uses both guns during a mission in Jamaica for this novel, then relies on the PPK in subsequent stories.