Pocket pistol
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In American English, a pocket pistol is any small, pocket-sized semi-automatic pistol, and is suitable for concealed carry in a pocket or a similar small space.
.25 ACP FN Baby Browning
Original Remington Model 95 derringer
Nineteenth Century Remington Vest-Pocket Pistol No. 1, .22 caliber, on display at the Cody Firearms Museum, Buffalo Bill Center of the West Cody, Wyoming.
Colt Model 1903 Pocket Hammerless
Snubnosed revolver
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A snubnosed revolver is a small, medium, or large frame revolver with a short barrel, generally less than 3 inches in length. Smaller such revolvers are often made with "bobbed" or "shrouded" hammers
Pocket pistol
…Thus, the a frequently advertised use of such firearms by cyclists was to ward off or combat aggressive canines. Introduced in the late 19th century, snubnosed revolvers such as the "Banker Special", "Sheriff's Model", and "Shopkeeper Special" versions of the Colt Single Action Army revolvers were made by Colt's…
A Colt Cobra and a Smith & Wesson Model 36 snubnosed revolvers
Webley .450 "British Bull Dog" model - 1870s
.32 caliber Smith & Wesson Safety Hammerless
Colt Detective Special