Patent ID: 8397413
Filing Date: 2013-03-19
Classification: F41C

Abstract:
1. A muzzle-loading firearm comprising: a stock; a frame connected with the stock; a barrel being coupled to the frame, the barrel having a muzzle end and a breech end and defining a longitudinal axis therethrough, the barrel having a rifled inner portion defining lands and grooves and a rifling diameter across the grooves of the rifled inner portion, the breech end having a breech chamber including an internal threading and a smooth cylindrical section having a first diameter that is greater than the rifling diameter, the smooth cylindrical section being separated from the rifled inner portion by an initial portion, the initial portion having a transition diameter being sized between the first diameter and the rifling diameter; and a breech plug being located within the breech chamber of the barrel, the breech plug having a threaded portion and a smooth portion located forward of the threaded portion, a sealing element being located adjacent the smooth portion, the threaded portion having external threading and the threaded portion having an outer diameter, the initial portion of the breech chamber being configured to deform the sealing element of the breech plug, during insertion of the breech plug into the breech end, from an initial diameter to a final diameter smaller than the initial diameter.