This tiny gun gives quite a bang for the buck. The 19th-century Le Petit Protector, the world’s smallest pistol, can be worn as a ring — and is expected to fetch more than $2,000 at auction. “This ...

Long before James Bond’s ingenious cigarette gun, ski pole gun, and yes, even bagpipe gun — there was the real-life “Le Petit Protector.” Scarcely larger than a fingernail, this unusual 19th century ...