The premise of 1941 in Paris - interesting. An agent would probably use items common to the territory. That means German/French/Polish weapons. The PPK in .32 (7.65mm) would be appropriate for under 25 (actually under 15) yds (meters in Europe). Not very powerful, but easy to pocket carry - especially in the trousers of the era. For a rifle, my inclination would be a Mannlincher in 7mm or a BRNO hunting rifle in the same caliber (just "shooting in the dark" as I'm not too familiar with European long arms). A spy would better able to acquire locally a descent hunting rifle/scope combination (and handguns also) from one of the Partisans . Distances of up to 500 meters would be fine unless you're looking at head shots. An assassin/trained marksman would be very comfortable targeting at these ranges. U.S. Marines all shoot standard infantry weapons at 500 yards in qualification - and consider dropping even one point at this range to be embarrassing.
