"Hard Rain" and it's sequal "Rain Fall" are set in Japan, so I think there is one mention of a pistol (a Glock) and it doesn't even get used. But the books are excellent. You will become a Scotch drinker afterwards
Andy McNab is very good, probably has the best credentials of any thriller writer. Michael Wynn has some pretty good gun stuff in his books. Vince Flynn is a little pulpy (but so is Hunter nowadays). Brad Thor is another decent thriller writer. All these guys have linear books, so it would help to start with the first one they published.