US 12578159

An analysis of US Patent 12,578,159 reveals a firearm trigger mechanism with selectable firing modes. The patent is assigned to ABC IP LLC and was invented by Brian A. Blakley. There is active litigation associated with this patent family.

Patent Summary

• Title: Firearm trigger mechanism
• Assignee: ABC IP LLC
• Inventor: Brian A Blakley
• Filing Date: July 2, 2024 (Application US18/761,606)
• Issue Date: March 17, 2026
• Abstract: The patent describes a trigger mechanism for firearms, particularly AR-pattern rifles, featuring a three-position safety selector. The three positions are "safe," "standard semi-automatic," and "forced reset semi-automatic." In the standard mode, the firearm operates as a typical semi-automatic, requiring the shooter to release the trigger to reset the hammer and fire again. In the forced reset mode, the cycling of the bolt carrier assembly mechanically forces the trigger to its reset position, allowing for rapid firing without the need for the user to manually release the trigger. This is achieved through the interaction of a cam, the bolt carrier, and the trigger member, with the safety selector determining whether the disconnector engages the hammer.

Plain-Language Overview of Independent Claims

The patent includes several independent claims, each defining the invention in a slightly different way. In essence, they protect the core concept of a trigger mechanism with two distinct semi-automatic modes.

• Claim 1: This claim protects a firearm trigger mechanism that can operate in two modes. In the first mode (standard semi-automatic), after a shot is fired, a component called a disconnector catches the hammer, and the user must let go of the trigger to allow the mechanism to reset for the next shot. In the second mode (forced reset), the mechanism is configured so that the disconnector is prevented from catching the hammer. Instead, the rearward movement of the firearm's bolt forces the trigger assembly to reset automatically, allowing the user to fire again without manually releasing the trigger. This is facilitated by a movable cam that interacts with the trigger.

• Claim 6: This claim is similar to claim 1 but focuses on the cam's role in preventing the trigger from being pulled until the action is fully cycled. It describes a trigger mechanism with the same two selectable modes (standard semi-automatic and forced reset). In the forced reset mode, the action of the bolt cycling not only resets the trigger but also utilizes a cam to block the trigger from being pulled again until the bolt is fully in battery, preventing an out-of-battery firing.

• Claim 10: This claim also describes a trigger mechanism with two selectable modes. It emphasizes that in the forced reset mode, the movement of the bolt causes a cam to move, and this cam movement is what forces the trigger back into its set position, ready to fire again, while simultaneously preventing the disconnector from holding the hammer.

• Claim 14: This claim broadly covers a trigger mechanism with the two selectable firing modes. It specifies that in the standard semi-automatic mode, the disconnector catches the hammer and requires a manual trigger release to reset. In the forced reset mode, the disconnector is prevented from holding the hammer, allowing the user to fire again after the bolt cycles without a manual trigger release. It focuses on the combination of a hammer, trigger member, disconnector, and a movable cam that forces the trigger toward its set position.

• Claim 15: This claim uses more functional language ("means for"). It protects a trigger mechanism with a selector for standard semi-automatic and forced reset modes. In the standard mode, a "disconnector hook means" catches a "hammer hook means," requiring a manual trigger release. In the forced reset mode, the disconnector is prevented from holding the hammer, allowing for another shot after the action cycles. This is achieved via a cam that forces the trigger to reset.

• Claim 16: Similar to the others, this claim protects a trigger mechanism with two modes. In the standard semi-automatic mode, a "disconnector hook means" catches the hammer after firing. In the forced reset mode, the disconnector is prevented from catching the hammer. A key element is a cam that forces the trigger toward its set position, enabling the user to fire again once the bolt is back in battery.

• Claim 17: This claim describes the invention in terms of a "movable blocking means" (the disconnector). A user-operated mode selector determines whether this blocking means will prevent the hammer and trigger from re-engaging after a shot until the user releases the trigger (semi-automatic mode), or if it will be bypassed, allowing a cam to forcibly reset the trigger for immediate subsequent firing (forced reset mode).

• Claim 18: This claim focuses on the cam's action based on the selected mode. It protects a trigger mechanism where a cam is moved by the cycling of the firearm's action. In standard semi-automatic mode, the cam moves the trigger but not enough to fully reset it, requiring a manual release by the user. In the forced reset mode, the cam forces the trigger all the way to its set condition, enabling the next shot without a manual release. It includes a "selector means" to enable or disable this complete, forced reset.

Litigation Search

A search of the patent's "Family has litigation" section indicates legal disputes. Specifically, cases have been filed in the Texas Eastern District Court (Case numbers 2:26-cv-00030 and 2:26-cv-00033). This indicates that the validity or infringement of patents within this family, which includes US12578159, has been subject to legal challenges. A search of the CAFC 2026 dockets for this specific patent number yielded no results, which is expected as appeals would typically occur after district court proceedings conclude.