A thumb rest mechanism for a firearm having a frame, providing a thumb rest mount secured to the frame and having a mount member defining a mount surface. A thumb rest being releasably secured to the mount member in engagement with the mount surface and having a thumb engaging surface oriented at a suitable angle for recoil resisting engagement by the thumb of a firearm user and being of roughened character for non-slip engagement by the thumb of the firearm user. A protective plate extending from the thumb rest a protecting the users thumb from contact and potential damage by a moveable firearm component.

The present disclosure relates to a modular firearm frame adapter that aid in making compatible a slide associated with a first firearm and a frame associated with a second firearm. The compatibility is such that the slide associated with a first firearm and a magazine associated with a second firearm being able to function properly as a single integrated firearm. This system includes an adapter, and one or more adapter elements that aids allowing the modular firearm to function properly.

The handgun contains a frame composed of polymer material, the frame contains a channel formed therein, wherein the channel contains sides, and a forward rail positioned within the channel.

The handgun contains a frame composed of polymer material, the frame contains a channel formed therein, wherein the channel contains sides, and a forward rail positioned within the channel.

A modular handgun system comprises an elongated universal trigger frame having a barrel locking block, a pair of slide rails, and an accessory rail. The trigger frame is adapted to have a trigger assembly mounted thereto. The system further comprises a grip frame having an elongated channel and a hand grip extending downwardly from the elongated channel. The trigger frame is removably mounted in the elongated channel of the grip frame. The accessory rail of the trigger frame is positioned forward of a forward end of the elongated channel of the grip frame so as to be exposed. The system further comprises a slide and barrel assembly slidably mounted on the slide rails of the trigger frame.

A modular handgun system comprises an elongated universal trigger frame having a barrel locking block, a pair of slide rails, and an accessory rail. The trigger frame is adapted to have a trigger assembly mounted thereto. The system further comprises a grip frame having an elongated channel and a hand grip extending downwardly from the elongated channel. The trigger frame is removably mounted in the elongated channel of the grip frame. The accessory rail of the trigger frame is positioned forward of a forward end of the elongated channel of the grip frame so as to be exposed. The system further comprises a slide and barrel assembly slidably mounted on the slide rails of the trigger frame.

Representative implementations of devices and techniques provide a handgun lower receiver to be used with firing components from a donor handgun. The lower receiver includes additional features to improve stability during a triggering event. The additional features can include a rear attachment port comprising a receptacle with a cavity for receiving a brace extension component. The receptacle can have one or more coupling features for coupling the brace extension component to the rear attachment port.

Representative implementations of devices and techniques provide a handgun lower receiver to be used with firing components from a donor handgun. The lower receiver includes additional features to improve stability during a triggering event. The additional features can include a rear attachment port comprising a receptacle with a cavity for receiving a brace extension component. The receptacle can have one or more coupling features for coupling the brace extension component to the rear attachment port.

A device implementable on a firearm includes an adjustable multi-angle grip. The grip includes an upper portion and a lower portion. The upper portion is configured to be coupled to a receiver portion of the firearm. The lower portion is pivotably coupled to the upper portion via a hinge on a front side of the grip such that an angle between a longitudinal axis of the lower portion and a longitudinal axis of a barrel of the firearm is variable.

A device implementable on a firearm includes an adjustable multi-angle grip. The grip includes an upper portion and a lower portion. The upper portion is configured to be coupled to a receiver portion of the firearm. The lower portion is pivotably coupled to the upper portion via a hinge on a front side of the grip such that an angle between a longitudinal axis of the lower portion and a longitudinal axis of a barrel of the firearm is variable.