One story I heard of the last air-to-air kill in Europe (at least for the USAAF) was an incident where a Piper Cub and a Fieseler Storch met eachother. The pilots fired at eachother with their handguns and the Cub pilot was victorious, apparently capturing the crew as well.
Just found this after a quick Google:
http://www.historicaviation.com/historicaviation/product_info.po;jsessionid=x4PqWpK7Rc0yiNtdA35yPv_ Q(CgqOmhPi)?ID=2883
And from the NASM website:
In another remarkable encounter, an L-4 entered into a dogfight with a Fiesler Storch (the German equivalent of the L-4) with each of the two-man crews shooting at each other with their side-arms. Lt. Duane Francis, pilot of the L-4, succeeded in shooting down the Storch, and even captured the crew.