The Cobray Pocket Pal was a unique revolver that featured the same break-action, layout, and hammer system of the Mossberg Brownie

Mossberg Brownie

The Mossberg Brownie was a four-barreled, .22 Long Rifle pistol, similar to a derringer or pepperbox, produced by O.F. Mossberg & Sons from 1920-1932. The Brownie was based on an earlier pistol patented and licensed to the Shattuck Company by Oscar Mossberg....

. Cobray combined this with a unique twin-barrel, dual-caliber system. Two "zig-zag" revolving cylinders were provided, one in .22 LR and the other in .380 ACP

.380 ACP

The .380 ACP pistol cartridge is a rimless, straight-walled pistol cartridge developed by firearms designer John Browning. The cartridge headspaces on the mouth of the case. It was introduced in 1908 by Colt, and has been a popular self-defense cartridge ever since...

. The same hammer fired either the .22 caliber in the bottom barrel or the .380 in the top depending on which cylinder was installed.