Abstract: A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Abstract: A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Abstract: A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Abstract: A rotary ammunition magazine cooperates with a bolt catch to hold the bolt of a firearm out of battery in an open position after the last round has been fired. A cam mounted on the rotor of the magazine actuates a movable body on the magazine housing as the cam rotates to feed ammunition to the action. The body moves to an extended position and engages a bolt catch pivotably mounted in the firearm receiver. The bolt catch is pivoted by the body into a position where it will engage the bolt and prevent it from returning to battery after the last round has been fired.

Abstract: A trigger mechanism has a first trigger which engages a sear connector and a second trigger, pivotably mounted on the first trigger, which supports the sear connector. The sear connector supports a sear, which holds a firing pin in the cocked position via a cocking piece. To discharge the firearm both triggers must be pulled. A safety lever has a hook which engages the second trigger and a projection which engages a spur on the first trigger when the lever is in the safe position.

Abstract: An improved muzzle-loading firearm with a removable, threadless breech plug retained by a breech plug retaining collar, and a barrel retaining nut for simplifying manufacture, cleaning, preventing fouling and over-pressure situations, and minimizing alignment issues during assembly of the firearm. The removable, threadless breech plug also allows for straightforward interchangeability of breech plugs for use with various primers and propellants. The muzzle-loading firearm has a barrel with a protrusion on the breech end of the barrel that fits into a matched groove within the mono block for use in aligning the barrel during assembly of the firearm. The muzzle-loading firearm has 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.

Abstract: An improved muzzle-loading firearm with a removable, threadless breech plug retained by a breech plug retaining collar, and a barrel retaining nut for simplifying manufacture, cleaning, preventing fouling and over-pressure situations, and minimizing alignment issues during assembly of the firearm. The removable, threadless breech plug also allows for straightforward interchangeability of breech plugs for use with various primers and propellants. The muzzle-loading firearm has a barrel with a protrusion on the breech end of the barrel that fits into a matched groove within the mono block for use in aligning the barrel during assembly of the firearm. The muzzle-loading firearm has 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.

Abstract: An improved muzzle-loading firearm with a removable, threadless breech plug retained by a breech plug retaining collar, and a barrel retaining nut for simplifying manufacture, cleaning, preventing fouling and over-pressure situations, and minimizing alignment issues during, assembly of the firearm. The removable, threadless breech plug also allows for straightforward interchangeability of breech plugs for use with various primers and propellants.

Abstract: A breech plug for a muzzle loading firearm is attachable to a barrel having a muzzle end and a breech end. A breech element having a breech face is connected to the breech end of the barrel. The breech element moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug body is removably attachable to the breech end of the barrel. The breech plug body has a rear face that abuts the breech face when the breech element is closed, so that a primer contained in a primer pocket in the rear face of the breech plug body is fully supported on all sides.

Abstract: An improved muzzle-loading firearm with a removable, threadless breech plug retained by a breech plug retaining collar, and a barrel retaining nut for simplifying manufacture, cleaning, preventing fouling and over-pressure situations, and minimizing alignment issues during, assembly of the firearm. The removable, threadless breech plug also allows for straightforward interchangeability of breech plugs for use with various primers and propellants.

Abstract: A breech plug for a muzzle loading firearm is attachable to a barrel having a muzzle end and a breech end. A breech element having a breech face is connected to the breech end of the barrel. The breech element moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug body is removably attachable to the breech end of the barrel. The breech plug body has a rear face that abuts the breech face when the breech element is closed, so that a primer contained in a primer pocket in the rear face of the breech plug body is fully supported on all sides.

Abstract: A muzzle loading firearm has a barrel with a bore on a bore axis, and has a muzzle end and a breech end. A frame is connected to the barrel, and has a breech face. The frame moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug is removably attached to the barrel, and is connected to the barrel by way of interrupted, or multistart threads, or locking lugs. The breech plug may have a rear face that abuts the breech face when the frame is closed, so that a primer contained in a primer pocket in the rear of the breech plug is fully supported on all sides.

Abstract: A muzzleloading firearm has a barrel with a bore on a bore axis, and the barrel has a muzzle end and a breech end. A frame is connected to the barrel, and has a breech face. The frame moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug is removably attached to the barrel. The breech plug including a seal element closely received by the bore. The seal element may be a set of piston rings that are received in a circumferential groove about a forward end of the plug, or may be a cup at the forward end, with a forward rim that flares under pressure to provide a gas seal.

Abstract: A multi-caliber firearm has a breech sleeve connecting a barrel to a receiver and a stock. The stock includes a forward V-block and a rearward V-block. Each of the V-blocks defines a V-cut along a top portion and a through hole substantially aligned with the cross-sectional center of the V-block. The forward V-block extends through a cutout portion of the receiver and into the breech sleeve. The breech sleeve is fastened to the stock through the through hole in the forward V-block to provide a rigid connection between the stock and the breech sleeve. The receiver is fastened to the stock through the through hole in the rearward V-block to provide a rigid connection between the receiver and the stock.

Abstract: A multi-caliber firearm has a breech sleeve connecting a barrel to a receiver and a stock. The stock includes a forward V-block and a rearward V-block. Each of the V-blocks defines a V-cut along a top portion and a through hole substantially aligned with the cross-sectional center of the V-block. The forward V-block extends through a cutout portion of the receiver and into the breech sleeve. The breech sleeve is fastened to the stock through the through hole in the forward V-block to provide a rigid connection between the stock and the breech sleeve. The receiver is fastened to the stock through the through hole in the rearward V-block to provide a rigid connection between the receiver and the stock.

Abstract: A muzzle loading firearm has a barrel with a bore on a bore axis, and has a muzzle end and a breech end. A frame is connected to the barrel, and has a breech face. The frame moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug is removably attached to the barrel, and is connected to the barrel by way of interrupted, or multistart threads, or locking lugs. The breech plug may have a rear face that abuts the breech face when the frame is closed, so that a primer contained in a primer pocket in the rear of the breech plug is fully supported on all sides.

Abstract: A muzzle loading firearm has a barrel with a bore on a bore axis, and has a muzzle end and a breech end. A frame is connected to the barrel, and has a breech face. The frame moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug is removably attached to the barrel, and is connected to the barrel by way of interrupted, or multistart threads, or locking lugs. The breech plug may have a rear face that abuts the breech face when the frame is closed, so that a primer contained in a primer pocket in the rear of the breech plug is fully supported on all sides.