1-7/8"  OAL This five shot pinfire revolver is modeled after the Colt Open Top revolver.  The cylinder must be turned by hand, and is held in position by a spring tensioned ball bearing pushing up into indents in the cylinder.  

The frame, is  nickle plated cast brass.  The hammer, trigger, and cylinder nickle plated steel.  

Above, shown actual size, is the open top with stained pear wood grips

...Prices:

Open Top Revolver with ivory, pear wood or Ebony grips $550.00
Open Top Revolverwith mother-of-pearl grips $575