Hammerless, striker fired model 1911 handgun and associated methods

What is this patent about?

’096 is related to the field of semi-automatic firearms, specifically focusing on the internal firing mechanisms of single-action handguns. It addresses the technical challenge of converting a traditional hammer-fired platform, such as the classic Model 1911, into a striker-fired system without sacrificing the specific trigger feel, pull weight, and short reset distance that users expect from such firearms.

The underlying idea behind ’096 is to replace the traditional pivoting hammer and complex sear linkage with a linear, vertically reciprocating sear that interacts directly with a spring-loaded firing pin. The key insight is the use of a bifurcated trigger bow lever that translates the horizontal movement of the trigger into vertical movement of the sear, allowing the firing pin to be released and then reset through a mechanical bypass that occurs during the trigger’s return stroke.

The claims of ’096 focus on a trigger bow assembly featuring a specialized lever mounted at its rear end that moves in a plane transverse to the slide's motion. This lever is equipped with camming surfaces—specifically a drive surface to push the sear down for firing and a release surface to allow the mechanism to reset—which engage a pin located at the bottom of a vertically sliding sear. The independent claims also cover a retrofit kit comprising a sear housing shaped to fit into the existing hammer cavity of a standard frame.

In practice, when the shooter pulls the trigger, the trigger bow moves rearward, causing the lever's cam surface to force the sear downward against spring pressure. This downward motion pulls the sear tab out of the path of the firing pin lug, allowing the striker assembly to fly forward and ignite the cartridge. As the trigger is released, the lever moves forward and deflects downward to bypass the sear pin, eventually snapping back into its ready position above the pin to enable the next shot.

This invention differentiates itself from prior approaches by maintaining the geometry and ergonomics of the 1911 frame while eliminating the external hammer. Unlike other striker conversions that require significant frame modification or result in a long, heavy trigger pull, this design uses a vertically reciprocating sear and a spring-loaded reset lever to preserve the crisp, short-travel trigger break characteristic of high-performance single-action pistols.