US12385709 - Two-stage trigger arrangement

The patent describes a two-stage trigger arrangement for a fire control mechanism that includes a trigger, hammer, and disconnector, with specific orientations for their respective sears. This design aims to enhance the interaction between the trigger and hammer while maintaining precise alignment with reference planes.

Claim 1

1. A fire control mechanism comprising: a trigger arranged to rotate about a trigger axis, the trigger comprising a trigger sear; a hammer arranged to rotate about a hammer axis, the hammer comprising a hammer sear and a secondary sear; and a disconnector arranged to move with respect to the trigger, the disconnector comprising a disconnector sear and a catch, the disconnector sear oriented at an angle to the catch; a first reference plane extending through the trigger axis and the hammer axis; the fire control mechanism comprising an orientation wherein the trigger sear contacts the hammer sear, and the secondary sear contacts the disconnector sear, the hammer sear is located to a first side of the first reference plane and the secondary sear is located to a second side of the first reference plane; the disconnector sear comprising a planar surface defining a second reference plane, the second reference plane intersecting the first reference plane at an intersection, wherein the intersection and the hammer axis are located on opposite sides of the trigger axis. a trigger arranged to rotate about a trigger axis, the trigger comprising a trigger sear; a hammer arranged to rotate about a hammer axis, the hammer comprising a hammer sear and a secondary sear; and a disconnector arranged to move with respect to the trigger, the disconnector comprising a disconnector sear and a catch, the disconnector sear oriented at an angle to the catch; a first reference plane extending through the trigger axis and the hammer axis; the fire control mechanism comprising an orientation wherein the trigger sear contacts the hammer sear, and the secondary sear contacts the disconnector sear, the hammer sear is located to a first side of the first reference plane and the secondary sear is located to a second side of the first reference plane; the disconnector sear comprising a planar surface defining a second reference plane, the second reference plane intersecting the first reference plane at an intersection, wherein the intersection and the hammer axis are located on opposite sides of the trigger axis.

Google Patents

https://patents.google.com/patent/US12385709

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12385709