DCT

4:26-cv-00379

ABC IP LLC v. Harrison Gunworks LLC

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 4:26-cv-00379, E.D. Tex., 05/27/2026
  • Venue Allegations: Venue is alleged to be proper in the Eastern District of Texas because Defendants reside and/or have a regular and established place of business in the District.
  • Core Dispute: Plaintiffs allege that Defendants' "Super Safety," "Defender FRT," and "MARC Selector" firearm trigger mechanisms infringe nine U.S. patents related to "forced reset" trigger technology.
  • Technical Context: The technology at issue involves trigger mechanisms for semi-automatic firearms, primarily of the AR-15 pattern, that use the energy from the cycling bolt carrier to mechanically reset the trigger, enabling a faster rate of fire than standard trigger designs.
  • Key Procedural History: The complaint states that Plaintiffs sent a cease and desist letter to Defendant Gunworks on March 28, 2025, providing notice of the '247 Patent. A subsequent notice on May 8, 2025, identified the '223, '003, '336, and '807 Patents. This history may be used to support allegations of willful infringement.

Case Timeline

Date Event
2017-09-29 U.S. Patent No. 10,514,223 Priority Date
2019-12-24 U.S. Patent No. 10,514,223 Issue Date
2020-01-01 Plaintiffs allegedly began using the "FRT" mark in commerce
2021-11-05 U.S. Patent No. 12,031,784 Priority Date
2022-01-10 Priority Date for U.S. Patent Nos. 11,724,003, 12,036,336, 12,274,807, and 12,636,403
2022-09-08 Priority Date for U.S. Patent Nos. 12,038,247 and 12,578,159
2023-08-15 U.S. Patent No. 11,724,003 Issue Date
2023-12-04 U.S. Patent No. 12,529,538 Priority Date
2024-07-09 U.S. Patent No. 12,031,784 Issue Date
2024-07-16 U.S. Patent Nos. 12,038,247 and 12,036,336 Issue Date
2025-03-28 Cease and Desist Letter regarding '247 Patent sent to Defendants
2025-04-15 U.S. Patent No. 12,274,807 Issue Date
2025-05-08 Notice of additional patents sent to Defendants
2026-01-20 U.S. Patent No. 12,529,538 Issue Date
2026-03-17 U.S. Patent No. 12,578,159 Issue Date
2026-05-26 U.S. Patent No. 12,636,403 Issue Date
2026-05-27 Complaint Filing Date

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 12,038,247 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,038,247, "Firearm Trigger Mechanism," issued July 16, 2024 (the '247 Patent) Compl. ¶11

The Invention Explained

  • Problem Addressed: Standard semi-automatic triggers require the user to consciously reduce pressure on the trigger after a shot to allow a disconnector to reset the hammer, which limits the potential rate of fire Compl. ¶¶27-28
  • The Patented Solution: The '247 Patent describes a dual-mode trigger mechanism that can operate in a standard semi-automatic mode or a "forced reset" mode Compl. ¶30 The mechanism uses a movable cam that, in the forced reset mode, interacts with the firearm's cycling bolt carrier to mechanically force the trigger back to its reset position. This action bypasses the traditional disconnector function and allows the user to fire again as soon as the action is in battery, without needing to manually release the trigger Compl. ¶60, pp. 29-30 '247 Patent, abstract
  • Technical Importance: The invention provides a user-selectable trigger system that offers both the deliberate feel of a standard semi-automatic trigger and the rapid-fire capability of a forced-reset system within a single, integrated mechanism Compl. ¶30

Key Claims at a Glance

  • The complaint asserts independent Claim 15 Compl. ¶58
  • Essential elements of Claim 15 include:
    • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam.
    • The mechanism is operable in a "standard semi-automatic mode" where the cam is in a first position, the disconnector catches the hammer, and the user must manually release the trigger to fire again.
    • The mechanism is also operable in a "forced reset semi-automatic mode" where the cam is in a second position and the disconnector hook is "prevented from catching said hammer hook," allowing the user to fire again once the bolt carrier returns to battery.
  • The complaint reserves the right to assert other claims Compl. ¶59

U.S. Patent No. 12,031,784 - "Adapted Forced Reset Trigger"

  • Patent Identification: U.S. Patent No. 12,031,784, "Adapted Forced Reset Trigger," issued July 9, 2024 (the '784 Patent) Compl. ¶12

The Invention Explained

  • Problem Addressed: The complaint notes that the invention is intended to overcome "geometric limitations of prior art designs for use in multiple and varied semi-automatic firearm designs" Compl. ¶31 The patent's background explains that forced reset triggers designed for one platform (e.g., AR-15) may not function in another (e.g., AR-10) due to different bolt carrier geometries and spacing, where a component might fail to actuate or might interfere with the bolt's movement '784 Patent, col. 1:21-44
  • The Patented Solution: The '784 Patent discloses an extended trigger locking device featuring a "deflectable extension" that is "separately movable" from the main body of the locking member Compl. ¶31 '784 Patent, abstract This allows the extension to be actuated by the forward movement of the bolt carrier but also to "deflect or fold" out of the way when contacted by a different part of the bolt carrier during its rearward cycle, preventing interference across platforms with different dimensions '784 Patent, col. 2:3-10
  • Technical Importance: This design provides a more universal "drop-in" forced reset trigger solution that is adaptable to a wider variety of firearm platforms without requiring platform-specific modifications Compl. ¶31

Key Claims at a Glance

  • The complaint asserts independent Claim 1 Compl. ¶73
  • Essential elements of Claim 1 include:
    • An extended trigger member locking device for a forced reset trigger mechanism.
    • A locking member movable between a locked first position and an unlocked second position.
    • The locking member includes a body portion and an "upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position."
  • The complaint reserves the right to assert other claims Compl. ¶74

U.S. Patent No. 12,529,538 - "Safety Mechanism for Firearm"

  • Patent Identification: U.S. Patent No. 12,529,538, "Safety Mechanism for Firearm," issued January 20, 2026 (the '538 Patent) Compl. ¶13
  • Technology Synopsis: The patent describes a safety mechanism with a cam selector that provides three modes of operation. By rotating the selector, the interaction between recesses on the cam and a tail portion of the trigger is changed to allow for a first mode of operation, a second mode, or a third "safe" mode that prevents the trigger from being pulled Compl. ¶32
  • Asserted Claims: Independent Claim 1 Compl. ¶88
  • Accused Features: The "Super Safety" product Compl. ¶89

U.S. Patent No. 12,578,159 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,578,159, "Firearm Trigger Mechanism," issued March 17, 2026 (the '159 Patent) Compl. ¶14
  • Technology Synopsis: This patent describes a dual-mode device for accelerating the firing sequence of a semi-automatic firearm. It uses a cam, rotated by the cycling of the bolt carrier, to either operate in a standard semi-automatic mode or a "forced reset" mode where the trigger is mechanically reset Compl. ¶30
  • Asserted Claims: Independent Claim 1 Compl. ¶102
  • Accused Features: The "Super Safety" and "MARC Selector" products Compl. ¶102

U.S. Patent No. 10,514,223 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 10,514,223, "Firearm Trigger Mechanism," issued December 24, 2019 (the '223 Patent) Compl. ¶15
  • Technology Synopsis: The patent discloses a forced reset mechanism where the cycling of the bolt carrier causes the hammer to contact the trigger member, mechanically resetting both. A locking bar prevents the trigger from being pulled again until the bolt carrier has returned to its in-battery position '223 Patent, abstract Compl. ¶33
  • Asserted Claims: Claim 4 Compl. ¶117
  • Accused Features: The "Defender FRT" product Compl. ¶117

U.S. Patent No. 11,724,003 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 11,724,003, "Firearm Trigger Mechanism," issued August 15, 2023 (the '003 Patent) Compl. ¶16
  • Technology Synopsis: The patent claims a device that can be selected to operate in two modes: a standard disconnector-based semi-automatic mode and a "forced reset" semi-automatic mode Compl. ¶34
  • Asserted Claims: Claim 4 Compl. ¶131
  • Accused Features: The "Defender FRT" product Compl. ¶131

U.S. Patent No. 12,036,336 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,036,336, "Firearm Trigger Mechanism," issued July 16, 2024 (the '336 Patent) Compl. ¶17
  • Technology Synopsis: The patent claims a device that can be selected to operate in two modes: a standard disconnector-based semi-automatic mode and a "forced reset" semi-automatic mode Compl. ¶34
  • Asserted Claims: Claim 3 Compl. ¶145
  • Accused Features: The "Defender FRT" product Compl. ¶145

U.S. Patent No. 12,274,807 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,274,807, "Firearm Trigger Mechanism," issued April 15, 2025 (the '807 Patent) Compl. ¶18
  • Technology Synopsis: The patent claims a device that can be selected to operate in two modes: a standard disconnector-based semi-automatic mode and a "forced reset" semi-automatic mode Compl. ¶34
  • Asserted Claims: Claim 1 Compl. ¶158
  • Accused Features: The "Defender FRT" product Compl. ¶158

U.S. Patent No. 12,636,403 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,636,403, "Firearm Trigger Mechanism," issued May 26, 2026 (the '403 Patent) Compl. ¶19
  • Technology Synopsis: The patent claims a device that can be selected to operate in two modes: a standard disconnector-based semi-automatic mode and a "forced reset" semi-automatic mode Compl. ¶34
  • Asserted Claims: Claim 38 Compl. ¶172
  • Accused Features: The "Super Safety," "MARC Selector," and "Defender FRT" products Compl. ¶172

III. The Accused Instrumentality

Product Identification

  • The accused instrumentalities are the "3 Position Super Safety" (the Super Safety), "the Defender FRT," and the "MARC AR15 Forced Reset Trigger" (the MARC Selector) (Compl. ¶¶37; Compl. ¶44; Compl. ¶48).

Functionality and Market Context

  • The complaint alleges all three products are aftermarket trigger mechanisms for AR-15 pattern firearms that provide a "forced reset" function (Compl. ¶¶43; Compl. ¶47; Compl. ¶51).
  • Each device is alleged to provide multiple modes of operation, typically including "safe," "standard semi-automatic," and a "forced reset" mode, selectable by the user (Compl. ¶¶43; Compl. ¶47; Compl. ¶51). The complaint includes a website screenshot for the "AR-SS D2 Curved Kit," a variant of the Super Safety, showing the components sold. Compl. p. 9
  • The products are sold via the website harrisongunworks.com as kits, standalone products, or as part of an installation service where Defendants install the devices into customer firearms (Compl. ¶¶38; Compl. ¶42; Compl. ¶45; Compl. ¶49). Plaintiffs allege Defendants market these products using the term "FRT" (Forced Reset Trigger), which Plaintiffs claim as their trademark Compl. ¶¶52-54 A screenshot from Defendants' Facebook page shows the "Defender FRT" advertised as a "3 position cassette-style FRT." Compl. p. 12

IV. Analysis of Infringement Allegations

'247 Patent Infringement Allegations

Claim Element (from Independent Claim 15) Alleged Infringing Functionality Complaint Citation Patent Citation
A firearm trigger mechanism comprising: When installed and used as directed, the Super Safety is part of a trigger mechanism and functions as a cam that in at least one mode, both causes the reset of the trigger and locks the trigger during the cycle of operation. ¶60 col. 8:1-12
a hammer having a sear catch and a hook for engaging a disconnector... The Super Safety is installed with a hammer that has a sear catch and a hook for engaging a disconnector. ¶60 col. 4:25-33
a trigger member having a sear and adapted to be mounted in the fire control mechanism pocket... The Super Safety is installed with a trigger member in the fire control mechanism pocket... The trigger member has a sear. ¶60 col. 4:51-57
a disconnector having a hook for engaging said hammer... The disconnector is adapted to be mounted in the fire control mechanism pocket... The disconnector has a hook for engaging the hammer. ¶60 col. 8:13-22
and a cam having a cam lobe and adapted to be movably mounted... The Super Safety has a cam with a cam lobe and lever that is adapted to be movably mounted in the fire control mechanism pocket. ¶60 col. 8:36-41
whereupon in a standard semi-automatic mode, ... at which time a user must manually release said trigger member to free said hammer from said disconnector... In one mode, the Super Safety operates like a standard AR-15 trigger, where the disconnector catches the hammer and the user must release the trigger to reset the mechanism. Plaintiff-generated renderings illustrate this operational mode. ¶60 col. 9:34-55
whereupon in a forced reset semi-automatic mode, ... rearward movement of the bolt carrier causes rearward pivoting of said hammer such that said disconnector hook is prevented from catching said hammer hook... In the "forced reset" mode, the cam mechanically moves the trigger toward the set position, and rearward movement of the bolt carrier causes the disconnector hook to be prevented from catching the hammer hook. Plaintiff-generated renderings illustrate the cam moving the trigger member. ¶60 col. 9:56-68
  • Identified Points of Contention:
    • Technical Question: A central technical question will be whether the accused "Super Safety" and "MARC Selector," in their "forced reset" modes, actually operate by "preventing" the disconnector hook from catching the hammer hook, as required by the claim. The infringement allegation relies on Plaintiff-generated renderings Compl. p. 30, and the factual basis for this specific interaction will be a key point of discovery and potential dispute.
    • Scope Question: The claim recites distinct "standard semi-automatic" and "forced reset semi-automatic" modes. The analysis may question whether the accused products' modes, described by Defendants as "passive" vs. "active" reset Compl. p. 9, technically and legally correspond to the modes as defined in the patent.

'784 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
In a forced reset trigger mechanism, an extended trigger member locking device, comprising: When installed and used as directed, the Super Safety is part of a trigger mechanism and functions as an extended trigger member locking device. ¶75 col. 4:58-60
a locking member that is movable between a first position in which it locks a trigger against pulling movement and a second position where it does not restrict movement... The Super Safety operates as a locking member and has a first position in which it locks the trigger member against pulling movement and is moveable to a second, unlocked position. ¶75 col. 5:1-11
and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier... The Super Safety has an upward extending portion (lever arm) configured to make actuating contact with a surface of the bolt carrier. ¶75 col. 5:11-20
the locking member having a body portion that is movably supported The MARC Selector has a body portion that is movably supported by the lower receiver. ¶76 col. 4:60-63
and an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position. The MARC Selector has an upwardly extending deflectable portion (lever arm). The connection is designed to allow separate movement of the lever arm relative to the body portion. ¶76 col. 4:63-68
  • Identified Points of Contention:
    • Scope Question: The infringement analysis for the '784 Patent will center on the construction of "upwardly extending deflectable portion that is separately movable relative to the body portion." The complaint alleges the pivoting lever arm of the accused products meets this limitation Compl. p. 54 A central question for the court will be whether "deflectable" can be construed to read on a rigid, pivoting component, or if it requires a component that bends or flexes.
    • Technical Question: What evidence does the complaint provide that the accused lever arm is "separately movable" in the manner claimed? The patent describes a one-way hinge feature that allows the extension to fold rearward to avoid interference while remaining rigid for forward actuation '784 Patent, col. 2:63-68 The dispute may focus on whether the accused products' simple pivoting achieves the same technical function in the same way.

V. Key Claim Terms for Construction

  • For the '247 Patent:

    • The Term: "prevented from catching said hammer hook"
    • Context and Importance: This phrase defines the core functional distinction of the "forced reset" mode in Claim 15. Whether the accused devices achieve this specific technical result-the complete prevention of the disconnector catching the hammer-will be critical to the infringement analysis. Practitioners may focus on this term because it implies an absolute condition, which may be difficult to prove or may be a point of non-infringement if the accused device merely makes the catch unlikely or bypasses it functionally without literal prevention.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The specification may describe the overall function as bypassing the need for the disconnector, which could support an argument that any mechanism achieving this functional bypass meets the "prevented" limitation, even without a specific physical block.
      • Evidence for a Narrower Interpretation: The patent's abstract describes the safety selector as "preventing the disconnector hook from catching the hammer hook" '247 Patent, abstract The specific embodiments may show a physical interaction where a part of the selector or cam directly blocks the disconnector's path, which would support a narrower definition requiring such a direct blockage.

  • For the '784 Patent:

    • The Term: "deflectable portion"
    • Context and Importance: This term is central to the novelty asserted in Claim 1, which aims to create a more universal forced reset trigger. The patent was filed to solve the problem of adapting prior art to different firearm geometries '784 Patent, col. 1:21-44 The meaning of "deflectable" will determine whether the accused pivoting levers fall within the claim's scope.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The specification uses the phrase "deflect or fold" '784 Patent, col. 2:7, which suggests that "deflect" could encompass a range of movements that get the extension out of the way, including pivoting.
      • Evidence for a Narrower Interpretation: The patent's summary of invention explicitly mentions a "one-way hinge feature" '784 Patent, col. 2:63-64, and the figures consistently illustrate a hinged or pivoting extension that is distinct from the main body's pivot axis. This may support an interpretation that "deflectable" requires a bending or hinged movement, not merely pivoting on a shared axis.

VI. Other Allegations

  • Indirect Infringement: The complaint alleges both induced and contributory infringement. Inducement is based on allegations that Defendants encourage and instruct customers on how to install and use the infringing devices in AR-15 firearms via their website and promotional materials (Compl. ¶¶62; Compl. 77; Compl. 91). Contributory infringement is based on allegations that the sold components, such as the cam and lever arm, are specially designed for infringing use and are not suitable for substantial non-infringing use (Compl. ¶¶64; Compl. 79; Compl. 93).
  • Willful Infringement: Willfulness allegations are based on pre-suit knowledge. The complaint alleges that Plaintiffs sent a cease and desist letter on March 28, 2025, and a subsequent notice on May 8, 2025, explicitly identifying several of the asserted patents Compl. ¶25 Compl. ¶26 The complaint claims that Defendants continued their infringing activities despite this knowledge Compl. ¶65

VII. Analyst's Conclusion: Key Questions for the Case

  • A core issue will be one of definitional scope: can the term "deflectable portion" from the '784 Patent, which the patent specification links to a "one-way hinge feature," be construed broadly enough to cover the allegedly simpler pivoting lever arms of the accused products?
  • A second central question will be one of technical operation: for the dual-mode patents (e.g., '247 Patent), do the accused products' "forced reset" modes function by literally "preventing" the disconnector from catching the hammer, as the claims require, or do they achieve a similar result through a different mechanism that may fall outside the claims' literal scope?
  • An evidentiary question will be the strength of Plaintiffs' allegations of trademark infringement and unfair competition, which run parallel to the patent claims and accuse Defendants of using the "FRT" mark to trade on Plaintiffs' goodwill Compl. ¶57
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