Patent No. US9347726 (titled "Striker style firearm with improved mechanical function") on May 19, 2015. The application was issued on May 24, 2016.
’726 is related to the field of striker-fired firearms, specifically focusing on the mechanical interface between the trigger, the sear, and the striker. Traditional striker designs often rely on complex trigger bars or transfer links to bridge the distance between the user’s finger and the firing mechanism, which can introduce stack-up tolerances and a spongy feel. This invention seeks to simplify the fire-control group to improve reliability and tactile feedback while streamlining the field-stripping process.
The underlying idea behind ’726 is the elimination of the traditional trigger bar by utilizing a direct-acting release lever integrated into the trigger body. By positioning the sear block at the front of the striker rather than the rear, the inventor allows the trigger to interact almost immediately with the sear. This compact arrangement uses a toggling lever that can pivot independently to allow the firearm to reset even while the user maintains a rearward hold on the trigger, effectively decoupling the reset cycle from the manual release of the trigger shoe.
The claims of ’726 focus on a trigger assembly comprising a main body and a pivotable release lever that collectively actuate a vertically translating sear block. The independent claims specify that the release lever is configured to rotate with the trigger body to trip the sear during firing, but is also capable of rotating relative to the trigger body when the slide returns to battery. This dual-motion capability ensures that the sear can return to its engagement position at the front of the striker without being obstructed by the trigger’s current state.
In practice, when the user pulls the trigger, the release lever moves upward, forcing the sear block out of engagement with the striker's front end to discharge the weapon. As the slide cycles and returns forward, the sear block strikes the release lever; because the lever is spring-biased and capable of independent rotation, it simply toggles out of the way to let the sear pass. Once the user finally releases the trigger, the lever snaps back into its ready position, re-establishing the mechanical link for the next shot.
This design differentiates itself from prior art by significantly reducing the parts count and utilizing the recoil spring to provide the biasing force for the slide stop, eliminating the need for a dedicated slide stop spring. Furthermore, because the trigger does not need to be pulled to release the striker during disassembly, the firearm offers a safer field-stripping procedure. The result is a highly integrated system where the trigger components and the recoil assembly perform multiple mechanical roles to ensure a crisp reset and simplified maintenance.
In the mid-2010s when ’726 was filed, striker-fired firearm architectures were typically implemented using a longitudinal trigger bar to translate trigger movement to a rear-mounted sear or striker release mechanism. At a time when systems commonly relied on these intermediate transfer elements to bridge the spatial gap between the forward trigger and the rearward firing pin, hardware constraints made the reduction of mechanical linkages non-trivial due to the need for reliable striker engagement and reset. Furthermore, slide stop mechanisms in this era generally required dedicated, independent biasing springs to maintain their position within the frame assembly.
The disclosed invention represents a meaningful technical advancement through an architectural shift that eliminates the traditional trigger bar, allowing the trigger to contact a sear block directly at the front of the striker. This integration reduces the total number of moving parts and minimizes mechanical tolerances between the user interface and the firing mechanism. The system achieves a more compact internal profile by utilizing a rotatable release lever on the trigger that toggles to allow striker reset even while the trigger remains depressed. Additionally, the design overcomes traditional component redundancy by utilizing the recoil spring to bias the slide stop, effectively enabling multi-functional use of existing spring tension to simplify the firearm's internal construction.
The patent contains a total of 20 claims, with claims 1, 10, 17, 18, 19, and 20 serving as the independent claims. These independent claims focus on the mechanical configuration of a firearm's firing mechanism, specifically the interaction between a trigger assembly featuring a release lever and a sear block that controls the release of a striker to initiate firing. The dependent claims serve to provide additional technical details regarding the movement planes of the sear block, the rotational reset behavior of the release lever, and the inclusion of specific components such as reset plungers, vertical striker pins, and slide stop releases.
Definitions of key terms used in the patent claims.
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