Manufactured by G.P. Foster of Taunton, Massachusetts, P.W. Porter's revolving turret rifles showcased a number of impressive features. This Second Type is fitted with an automatic percussion primer and a loading lever and is equipped with left-offset blade front and adjustable notch rear sights. "ADDRESS/P.W. PORTER/NEW=YORK" and "P.W. PORTER'S/PATENT./1851." are stamped on the upper right barrel flat. The turret is numbered "411", while "314" is marked on various other components, including the barrel, frame, and lock plate. The rifle is mounted with a smooth straight wrist stock with a steel crescent buttplate.