Abstract: A firearm with a barrel fixed to a firearm body by at least one screw, wherein the firearm body includes a housing to receive the barrel and wherein the screw is fixed to the firearm body so that the firearm body tightens against or grips the outer surface of the barrel. In order to strengthen the connection between the barrel and the firearm body and fully ensure that the former does not move in either a longitudinal or rotary direction in relation to the latter, the barrel includes at least one surface hollow on its outer surface, and part of the screws already fixed to the firearm body are arranged inside a surface hollow, so that the screws inserted partly into the surface hollow provide longitudinal and rotary locking of the barrel against the firearm body.

Abstract: A bolt assembly for a firearm, wherein the bolt assembly is intended to move inside an inner cavity of a receiver of the firearm and comprises a body, a removable bolt head, at least one protruding element that tends to protrude elastically from the body, so that when allowed to protrude elastically unhindered, the bolt assembly cannot be inserted inside the inner cavity of the receiver. The connection of the bolt head to the body causes the protruding element to elastically contract, enough to allow the bolt assembly to be inserted inside the inner cavity of the receiver. Thus, a single elastic protruding element enables the user to be warned if trying to assemble the body without the bolt head into the receiver.

Abstract: A breech plug for removable engagement with a muzzle-loading firearm barrel having a seating surface that forms an oblique angle with the longitudinal axis of the barrel. The breech plug includes a circumferential tightening mechanism. The circumferential tightening mechanism is configured to move the breech plug along the longitudinal axis within the firearm barrel. The breech plug also includes a continuous flange with a circumferential distal edge. The distal edge is configured to form a seal with the firearm barrel oblique angle seating surface upon movement of the breech plug by the circumferential tightening mechanism.

Abstract: Muzzle-loading rifle, which comprises a breech plug (1) and a barrel (2), both fixed in a connection area (3), characterized in that the breech plug (1) is provided with a continuous flange (11) that presses from inside against a seating surface (12) of the barrel (2) when the breech plug (1) is fitted in the interior of the barrel (2), so that said pressure increases when the powder (7) explodes on the second end (5) of the breech plug (1). As a result, the seal between the breech plug (1) and the barrel (2) is strengthened and the gunpowder is prevented from reaching the connection area (3), thereby making it easier to detach the breech plug (1).

Abstract: Muzzle-loading rifle, which comprises a breech plug (1) and a barrel (2), both fixed in a connection area (3), characterised in that the breech plug (1) is provided with a continuous flange (11) that presses from inside against a seating surface (12) of the barrel (2) when the breech plug (1) is fitted in the interior of the barrel (2), so that said pressure increases when the powder (7) explodes on the second end (5) of the breech plug (1). As a result, the seal between the breech plug (1) and the barrel (2) is strengthened and the gunpowder is prevented from reaching the connection area (3), thereby making it easier to detach the breech plug (1).

Abstract: A rifle which is comprised of a barrel, an internal striker, a firing device connected to the striker, and a base which includes the butt and the lower part of the weapon. The striker receives a spring in a hole, which rests in a rear plug of the barrel. The firing mechanism is connected to a bolt lever and safety which inserts transversely therein. The firing mechanism is at the same time a safety, since when the weapon is loaded it is in non-firing position, and the outside activation of the safety catch is necessary to make the discharge.

Abstract: Accessories for muzzle-loading firearms including a wrench for working with the nipples of muzzle-loading firearms, with a cylindrical tubular body equipped with a truncated conical end with a circular longitudinal axial opening. A continuation of this opening, which is circular, receives replacement nipples controlled by the end of the opening itself and by a pin that goes through the base body. A nut plugs the opening in the tubular body and is screwed onto the other inside end of the base body. The nut is provided with a rod which passes through the pin and the nipples. A further accessory is provided in the form of a ramrod provided with metal ends pressure-fit and secured to the wood body of the ramrod by some notches that penetrate into the wood of the ramrod.