The Mossberg Brownie is a four shot, .22 Long Rifle pistol, similar to a derringer or pepperbox, produced by O.F.

[2][3] The Brownie is based on an earlier pistol patented and licensed to the Shattuck Company by Oscar Mossberg.

Mossberg provided a piece of bent sheet metal to extract spent casings.

[2] The Advantage Arms design was also produced in a .22 Winchester Magnum Rimfire chambering, and models featured an internal extractor.

Cobray also produced an odd revolver called the "Pocket Pal" that featured the same break action, layout, and hammer system of the Brownie.