Here’s one early solution to the problem of limited magazine capacity. Between 1859 and 1862, a French inventor named Jarre patented several so-called harmonica pistols. As often as the user needed a fresh round, s/he could just push the magazine laterally. The pinfire example pictured above could hold nine 9mm cartridges.
Mehr Info’s dazu gibt es hier. Wer das nötige Kleingeld hat, sollte doch hier mal mitbieten.