Firearm trigger mechanisms with rotatable linkage members and associated systems and methods are disclosed herein. A firearm trigger assembly configured in accordance with embodiments of the present technology can include, for example, a trigger, first and second linkage members, and a sear. The first linkage member, second linkage member, and sear are arranged in an over-center configuration that securely locks the sear in a first position. Pulling on the trigger causes the trigger to rotate about a fixed pivot point and push on one of the two linkage members, forcing the linkage members and the sear out of the over-center configuration. The force from a striking mechanism forces the sear and the linkage members into a collapsed configuration, releasing the striking mechanism and firing the firearm. This two toggle configuration of the trigger assembly provides crisp and reliable release of the firearm.

Firearm trigger mechanisms with rotatable linkage members and associated systems and methods are disclosed herein. A firearm trigger assembly configured in accordance with embodiments of the present technology can include, for example, a trigger, first and second linkage members, and a sear. The first linkage member, second linkage member, and sear are arranged in an over-center configuration that securely locks the sear in a first position. Pulling on the trigger causes the trigger to rotate about a fixed pivot point and push on one of the two linkage members, forcing the linkage members and the sear out of the over-center configuration. The force from a striking mechanism forces the sear and the linkage members into a collapsed configuration, releasing the striking mechanism and firing the firearm. This two toggle configuration of the trigger assembly provides crisp and reliable release of the firearm.

A method for sear engagement adjustment of a firearm trigger mechanism by installing a sear control device comprised of a compression spring of a given wire diameter or tube of a given wall thickness over a sear stop pin. The thickness of the sear control device installed over the sear stop pin affects sear engagement. The method for sear engagement adjustment is applied by changing between sear control devices of different thickness until a desired level of sear engagement is achieved.

A method for sear engagement adjustment of a firearm trigger mechanism by installing a sear control device comprised of a compression spring of a given wire diameter or tube of a given wall thickness over a sear stop pin. The thickness of the sear control device installed over the sear stop pin affects sear engagement. The method for sear engagement adjustment is applied by changing between sear control devices of different thickness until a desired level of sear engagement is achieved.

A trigger unit for a firearm, including a hammer rotatable about a hammer axis and prestressable by a hammer spring, a trigger lever rotatable about a trigger axis, the trigger lever has a trigger and a trigger rear, which receives at least one interrupter. A sear is rotatably mounted about a sear axis and prestressable by a sear spring. The sear axis and the trigger axis coincide, and the sear has a bearing recess for receiving and limited rotation about a disconnector axis of a disconnector pivot formed on the underside of the disconnector, the bearing recess being formed surrounding the disconnector pivot at least partially in the direction of rotation about the disconnector axis.

A trigger unit for a firearm, including a hammer rotatable about a hammer axis and prestressable by a hammer spring, a trigger lever rotatable about a trigger axis, the trigger lever has a trigger and a trigger rear, which receives at least one interrupter. A sear is rotatably mounted about a sear axis and prestressable by a sear spring. The sear axis and the trigger axis coincide, and the sear has a bearing recess for receiving and limited rotation about a disconnector axis of a disconnector pivot formed on the underside of the disconnector, the bearing recess being formed surrounding the disconnector pivot at least partially in the direction of rotation about the disconnector axis.

A trigger unit for a firearm, including a trigger bar that lies below the trigger axis. A trigger lever has a rear which accommodates at least one disconnector. A sear, rotatable about a sear axis can be biased by means of a sear spring. The hammer axis, the trigger axis and the sear axis are arranged parallel to one another and parallel to a transverse direction. The trigger lever has a recess and the sear is at least partially arranged within. The sear axis and the trigger axis coincide. The sear limits rotation of a disconnector joint formed on the underside of the disconnector; the bearing encloses the disconnector joint at least partially.

A trigger unit for a firearm, including a trigger bar that lies below the trigger axis. A trigger lever has a rear which accommodates at least one disconnector. A sear, rotatable about a sear axis can be biased by means of a sear spring. The hammer axis, the trigger axis and the sear axis are arranged parallel to one another and parallel to a transverse direction. The trigger lever has a recess and the sear is at least partially arranged within. The sear axis and the trigger axis coincide. The sear limits rotation of a disconnector joint formed on the underside of the disconnector; the bearing encloses the disconnector joint at least partially.

An optical trigger for bows, crossbows and firearms preferably includes a trigger member, a light source and a light receiver. The trigger member is pivotally retained relative to at least one surface with a pivot rod. The trigger member preferably includes a pull area and an actuation area. An actuation hole is preferably formed above a pivot point. The actuation hole allows light to travel from the light source to the light receiver. The light source and the light receiver are retained relative to one of first and second sides of the trigger member. One end of a spring is engaged with an edge of the actuation area and the other end is retained relative to a support surface. It is preferable to have a light shield located on opposing sides of the trigger member. Each light shield surrounds the actuation hole and the light source or light receiver.

An optical trigger for bows, crossbows and firearms preferably includes a trigger member, a light source and a light receiver. The trigger member is pivotally retained relative to at least one surface with a pivot rod. The trigger member preferably includes a pull area and an actuation area. An actuation hole is preferably formed above a pivot point. The actuation hole allows light to travel from the light source to the light receiver. The light source and the light receiver are retained relative to one of first and second sides of the trigger member. One end of a spring is engaged with an edge of the actuation area and the other end is retained relative to a support surface. It is preferable to have a light shield located on opposing sides of the trigger member. Each light shield surrounds the actuation hole and the light source or light receiver.