Patent ID: 9441908
Filing Date: 2016-09-13
CPC Classification: F41A,F41C

Claim Text:
1. A muzzle-loading firearm, comprising: a barrel, wherein the barrel has a bore, a breech end, and a muzzle end, and wherein the barrel is externally-threaded at the breech end; a mono block, wherein the mono block has a breech end and a muzzle end, and is adapted to accept the breech end of the barrel when the barrel is inserted into the mono block; a barrel retaining nut, wherein the barrel retaining nut is internally threaded to accept the threaded end of the barrel thereby retaining the barrel in the mono block; an internally-threaded breech plug retaining collar configured to retain a breech plug in the breech end of the barrel, wherein the internally-threaded breech plug retaining collar has a breech face and a muzzle face and is threaded onto the breech end of the barrel so the muzzle end of the breech plug retaining collar abuts the barrel retaining nut when installed on the firearm; and an interlock lever with a first end, a second end and a protrusion, wherein said interlock lever is rotatably attached to the mono block and biased by a spring such that the protrusion will strike a button on a receiver of the firearm and prevent a breech of the firearm from closing unless the breech plug retaining collar is threaded onto the breech end of the barrel thereby impinging on the first end of the interlock lever and rotating the interlock lever so that the protrusion does not strike the button on the receiver of the firearm and prevent the breech from closing.