Gun comprising a gun frame; a barre supported by the gun frame, proximally delimiting a firing chamber extending along a longitudinal axis; a slide, translatable longitudinally in relation to the barrel between a forward configuration wherein the slide closes the firing chamber, and a rearward configuration wherein it is distanced from a proximal mouth of the firing chamber, to open the latter; wherein orientation of said chamber is substantially parallel to said axis in the forward configuration and in the rearward configuration; and a locking device mechanically locking barrel and slide to each other in the forward configuration, and that in the rearward configuration is guided transversally in relation to the barrel for unlocking the slide. Slide and locking device delimit arched locking surfaces that in the forward configuration are coupled with each other for locking the slide, and that in the rearward configuration are mutually spaced in a transversal direction for opening said chamber.

Gun comprising a gun frame; a barre supported by the gun frame, proximally delimiting a firing chamber extending along a longitudinal axis; a slide, translatable longitudinally in relation to the barrel between a forward configuration wherein the slide closes the firing chamber, and a rearward configuration wherein it is distanced from a proximal mouth of the firing chamber, to open the latter; wherein orientation of said chamber is substantially parallel to said axis in the forward configuration and in the rearward configuration; and a locking device mechanically locking barrel and slide to each other in the forward configuration, and that in the rearward configuration is guided transversally in relation to the barrel for unlocking the slide. Slide and locking device delimit arched locking surfaces that in the forward configuration are coupled with each other for locking the slide, and that in the rearward configuration are mutually spaced in a transversal direction for opening said chamber.

Pistols have a body having a grip, the grip defining a magazine passage adapted to receive a magazine, the grip having opposed left and right side walls and a front portion and an opposed rear portion, the front portion of the grip including a first front strap attachment facility, a front strap element having a second front strap attachment facility adapted to removably connect to the first front strap attachment facility, and the front portion of the grip defining a front path and the front strap element being an elongated element movable along the front path, such that the front strap element is removable for replacement by an alternate front strap element. A funnel element may be adapted for connection to the frame at a lower rim of the grip at an installed position.

Pistols have a body having a grip, the grip defining a magazine passage adapted to receive a magazine, the grip having opposed left and right side walls and a front portion and an opposed rear portion, the front portion of the grip including a first front strap attachment facility, a front strap element having a second front strap attachment facility adapted to removably connect to the first front strap attachment facility, and the front portion of the grip defining a front path and the front strap element being an elongated element movable along the front path, such that the front strap element is removable for replacement by an alternate front strap element. A funnel element may be adapted for connection to the frame at a lower rim of the grip at an installed position.

Pistols have a body having a grip, the grip defining an elongated magazine passage adapted to receive a magazine and defining a magazine axis, the grip having opposed left and right side walls and a front portion and an opposed rear portion, the body having an upper portion having a first linear interface element aligned with an attachment axis offset from the magazine axis, and a removable backstrap element adapted to overlay the rear portion of the grip and having a second linear interface element adapted to removably connect to the first linear interface element. The pistol frame may include slide rails defining a slide plane, and the first linear interface element may be parallel to the slide plane. The first linear interface element and the second linear interface element may comprise a sliding interface. The sliding interface may be a dovetail feature.

Pistols have a body having a grip, the grip defining an elongated magazine passage adapted to receive a magazine and defining a magazine axis, the grip having opposed left and right side walls and a front portion and an opposed rear portion, the body having an upper portion having a first linear interface element aligned with an attachment axis offset from the magazine axis, and a removable backstrap element adapted to overlay the rear portion of the grip and having a second linear interface element adapted to removably connect to the first linear interface element. The pistol frame may include slide rails defining a slide plane, and the first linear interface element may be parallel to the slide plane. The first linear interface element and the second linear interface element may comprise a sliding interface. The sliding interface may be a dovetail feature.

A rifle platform with semi-automatic, select fire, and/or fully automatic shooting options uses a pistol cartridge. The rifle barrel includes an extension having a ramp for loading the cartridges and having a key way for the shell extractor. The magazine of the rifle is mounted to the lower receiver so as to load the cartridges in a direction perpendicular to the rifle barrel. The magazine follower automatically locks the bolt after the last cartridge is fired. The bolt and bolt carrier are integrally machined, and fully enclose the cartridge to preclude out of battery firing.

A rifle platform with semi-automatic, select fire, and/or fully automatic shooting options uses a pistol cartridge. The rifle barrel includes an extension having a ramp for loading the cartridges and having a key way for the shell extractor. The magazine of the rifle is mounted to the lower receiver so as to load the cartridges in a direction perpendicular to the rifle barrel. The magazine follower automatically locks the bolt after the last cartridge is fired. The bolt and bolt carrier are integrally machined, and fully enclose the cartridge to preclude out of battery firing.

A shroud may include a hood component, faceplate component, floorplate component and/or other fitments which may partially or completely cover or extend beyond certain constituents of a firearm. Each of the components and fitments may include various functional and/or aesthetic features that prevent a firearm's reciprocating mechanism from malfunctioning by being moved out-of-battery, not cycling completely or being fouled by debris. Additionally, the components, fitments, functions and features improve: the distribution of weight on a firearm, the ability to grip and operate a firearm, and the options for using a firearm, both in its traditional and new alternative ways, collectively to enhance a firearm operator's defensive and/or combative capabilities.

A shroud may include a hood component, faceplate component, floorplate component and/or other fitments which may partially or completely cover or extend beyond certain constituents of a firearm. Each of the components and fitments may include various functional and/or aesthetic features that prevent a firearm's reciprocating mechanism from malfunctioning by being moved out-of-battery, not cycling completely or being fouled by debris. Additionally, the components, fitments, functions and features improve: the distribution of weight on a firearm, the ability to grip and operate a firearm, and the options for using a firearm, both in its traditional and new alternative ways, collectively to enhance a firearm operator's defensive and/or combative capabilities.