Came off of an octagon barrelled Japanese made "Tower" pistol. Needs work to make it function. Geometry is off and would require reshaping the cock, and possible replacement of the tumbler, because it does not hold at half cock and the frizzen does have space to close if a flint is installed. Doesn't spark at present. Mainspring and internals might all need heat treatment. Includes one sidenail/bolt. $30 shipped CONUS. PM if interested.