Winant's book IS the catalog of the weird and strange.
Couple of thoughts- A Lemat? Dardick? Webley-Fosberry? Gyrojet? Luger carbine (not the artillery model pistol) M2 Carbine? Mondragon? A Kolibri 2.7mm auto pistol? A Lilliput? 5mm Clements? Shotgun in unusual gauge- like 14 or 32 g? .50 cal Remington rolling block pistol?
(excuse me- spellchecker just threw up on the keyboard
Just stay away from the early Mossberg .22s, and nobody gets hurt, see?