ABC IP LLC v. Webcorp Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware) and Rare Breed Triggers, Inc. (Texas)
  • Defendant: Webcorp, Inc. (Missouri) and Thomas Kirgin Jr. (Missouri)
  • Plaintiff's Counsel: Stinson LLP
• Case Identification: ABC IP, LLC v. Webcorp, Inc., 4:26-cv-00018, E.D. Mo., 03/24/2026
• Venue Allegations: Plaintiffs allege venue is proper because Defendants have committed acts of infringement in the district and maintain regular and established places of business there.
• Core Dispute: Plaintiffs allege that Defendants' "Atrius" and "Partisan Disruptor" firearm trigger mechanisms infringe seven U.S. patents related to forced-reset and selectable-mode trigger technologies.
• Technical Context: The technology at issue involves mechanisms for semi-automatic firearms, specifically "forced reset triggers," which use the firearm's action to mechanically reset the trigger, enabling a faster rate of fire compared to standard designs.
• Key Procedural History: The complaint alleges that principals of Plaintiff ABC discussed the Asserted Patents with Defendant Thomas Kirgin Jr. in 2024, an event Plaintiffs cite to support their claim 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
2021-11-05	U.S. Patent No. 12,031,784 Priority Date
2022-01-10	U.S. Patent Nos. 11,724,003, 12,036,336, and 12,274,807 Priority Date
2022-09-08	U.S. Patent Nos. 12,038,247 and 12,578,159 Priority Date
2023-08-15	U.S. Patent No. 11,724,003 Issue Date
2024	Alleged pre-suit knowledge conversation between parties
2024-07-09	U.S. Patent No. 12,031,784 Issue Date
2024-07-16	U.S. Patent No. 12,038,247 Issue Date
2024-07-16	U.S. Patent No. 12,036,336 Issue Date
2025-04-15	U.S. Patent No. 12,274,807 Issue Date
2026-03-17	U.S. Patent No. 12,578,159 Issue Date
2026-03-24	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").

The Invention Explained

• Problem Addressed: Standard semi-automatic triggers limit the rate of fire because a user must manually release the trigger to reset the disconnector before firing a subsequent round Compl. ¶¶24-25 Prior art devices for accelerating the rate of fire are described as being potentially complex or requiring practice to use reliably '247 Patent, col. 1:53-2:18
• The Patented Solution: The invention is a trigger mechanism, operable as a "drop-in" module, that offers selectable modes of operation '247 Patent, abstract In one mode, it functions as a standard semi-automatic trigger. In a "forced reset" mode, a pivoting cam, actuated by the cycling of the bolt carrier, forces the trigger member back to its reset position, allowing for a more rapid firing sequence without the user needing to manually release the trigger Compl. ¶27 '247 Patent, col. 2:20-40
• Technical Importance: The invention provides a selectable mechanism to increase the rate of fire for popular firearm platforms like the AR-15, combining standard operation with a forced-reset capability in a single device Compl. ¶27

Key Claims at a Glance

• The complaint asserts independent claim 15 Compl. ¶46
• Claim 15 of the '247 Patent recites the following essential elements:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam with a cam lobe.
  • The cam is movable between a first position for a "standard semi-automatic mode" and a second position for a "forced reset semi-automatic mode."
  • In the standard mode, rearward movement of the bolt carrier causes the disconnector hook to catch the hammer hook, requiring a user to manually release the trigger to fire again.
  • In the forced reset mode, the cam lobe forces the trigger member toward its set position, and the disconnector hook is prevented from catching the hammer hook, allowing the user to fire again without manual release.

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").

The Invention Explained

• Problem Addressed: The patent's background explains that adapting forced reset triggers across different firearm platforms (e.g., AR-15 vs. AR-10) is difficult due to varying geometries, where a component designed for one may physically interfere with the bolt carrier of another '784 Patent, col. 1:15-2:4
• The Patented Solution: The invention is an extended trigger member locking device featuring a "deflectable extension" '784 Patent, abstract This extension is designed to be actuated by the bolt carrier's forward movement to unlock the trigger, but it can also "deflect or fold" out of the way when contacted by a different part of the bolt carrier during its rearward cycle, thus avoiding interference Compl. ¶28 '784 Patent, col. 2:5-12
• Technical Importance: This design enhances the versatility of forced reset mechanisms, enabling a single "drop-in" device to be compatible with a wider range of firearms that have different internal dimensions Compl. ¶28

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶60
• Claim 1 of the '784 Patent recites the following essential elements:
  • In a forced reset trigger mechanism, an extended trigger member locking device.
  • The device comprises a locking member movable between a first (locked) position and a second (unlocked) position.
  • The locking member includes an upward extension to make actuating contact with the bolt carrier.
  • The locking member has a body portion and an "upwardly extending deflectable portion that is separately movable relative to the body portion."

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: The '159 Patent describes a firearm trigger mechanism that provides for an accelerated rate of semiautomatic firing. The device is selectable to operate in either a standard semiautomatic mode or a forced reset semiautomatic mode and uses a cam, rotated by the cycling of the action, to force the trigger member to reset Compl. ¶27
• Asserted Claims: Claim 1 Compl. ¶74
• Accused Features: The complaint alleges that the First Infringing Device, the "Atrius Forced Reset Selector," infringes by providing selectable standard and forced-reset modes of operation Compl. ¶¶32-36

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 '223 Patent describes a forced reset trigger where the cycling of the firearm's action causes the hammer to make contact with the trigger member, forcing it to reset. A locking bar is included to prevent the trigger from being pulled again until the bolt carrier has returned to its in-battery position (Compl. ¶29; '223 Patent, abstract).
• Asserted Claims: Claim 4 Compl. ¶88
• Accused Features: The complaint alleges that the Second Infringing Device, the "Partisan Disruptor," infringes by using hammer contact to reset the trigger and a locking bar to prevent out-of-battery firing Compl. ¶¶37-42

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 '003 Patent describes a trigger device that can be selected to operate in either a standard disconnector semiautomatic mode or a forced reset semiautomatic mode Compl. ¶30 '003 Patent, abstract
• Asserted Claims: Claim 4 Compl. ¶103
• Accused Features: The complaint alleges the Second Infringing Device, the "Partisan Disruptor," infringes by offering selectable standard and forced reset modes Compl. ¶¶37-41

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 '336 Patent describes a trigger device with selectable operation between a standard disconnector semiautomatic mode and a forced reset semiautomatic mode Compl. ¶30 '336 Patent, abstract
• Asserted Claims: Claim 3 Compl. ¶118
• Accused Features: The complaint alleges the Second Infringing Device, the "Partisan Disruptor," infringes by offering selectable standard and forced reset modes Compl. ¶¶37-41

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 '807 Patent describes a selectable trigger device that operates in either a standard disconnector semiautomatic mode or a forced reset semiautomatic mode Compl. ¶30 '807 Patent, abstract
• Asserted Claims: Claim 1 Compl. ¶133
• Accused Features: The complaint alleges the Second Infringing Device, the "Partisan Disruptor," infringes by offering selectable standard and forced reset modes Compl. ¶¶37-41

III. The Accused Instrumentality

Product Identification

• The complaint identifies two accused product lines: the "Atrius Forced Reset Selector" (First Infringing Device) and the "Partisan Disruptor" (Second Infringing Device) Compl. ¶32 Compl. ¶37

Functionality and Market Context

• The "Atrius Forced Reset Selector" is described as a three-position selector providing "SAFE, SEMI (traditional), and SUPER-SEMI" modes for AR-15 pattern firearms Compl. ¶36 Compl. p. 8 The complaint alleges it is sold as a standalone component, with other trigger parts, or pre-installed in a firearm receiver Compl. ¶34 A product page screenshot shows this device is marketed as a "drop-in replacement" that allows a user to "force the reset" of the trigger Compl. p. 8
• The "Partisan Disruptor" is described as a forced reset trigger assembly with a three-position safety selector for "Safe, Semi-Automatic, and Enhanced Semi-Automatic modes" Compl. ¶41 Compl. p. 12 This device is also allegedly sold as a standalone product or pre-installed in a receiver or complete firearm Compl. ¶39
• Both products are allegedly sold through Defendants' various websites, including tacticalshit.com, and promoted via email marketing Compl. ¶33 Compl. ¶38

IV. Analysis of Infringement Allegations

12,038,247 Patent Infringement Allegations

Claim Element (from Independent Claim 15)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A firearm trigger mechanism comprising: a hammer having a sear catch and a hook for engaging a disconnector... a trigger member having a sear... said disconnector having a hook for engaging said hammer... and a cam having a cam lobe...	The complaint alleges the Atrius Forced Reset Selector is part of a trigger mechanism that includes a hammer, trigger, disconnector, and a cam (the selector itself) Compl. ¶48 Compl. p. 15 The complaint provides a color-coded rendering identifying these components Compl. p. 15	¶48	col. 6:49-7:36
whereupon in a standard semi-automatic mode, said cam is in said first position, rearward movement of the bolt carrier causes rearward pivoting of said hammer such that said disconnector hook catches said hammer hook... at which time a user must manually release said trigger member...	In the standard semi-automatic mode, the Atrius device's cam is allegedly in a first position where, after firing, rearward bolt carrier movement causes the disconnector to catch the hammer, requiring the user to manually release the trigger to reset the mechanism Compl. ¶48	¶48	col. 8:33-51
whereupon in a forced reset semi-automatic mode, said cam is in said second position, 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 semi-automatic mode, the Atrius device's cam is allegedly in a second position where it "forces the trigger member toward the set position," and rearward bolt carrier movement pivots the hammer in a way that "the disconnector (Orange) hook is prevented from catching the hammer hook" Compl. ¶48	¶48	col. 8:52-67

12,031,784 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
In a forced rest trigger mechanism, an extended trigger member locking device, comprising: 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...	The complaint alleges the Atrius Forced Reset Selector functions as an extended trigger member locking device, operating as a locking member that moves between a locked first position and an unlocked second position Compl. ¶62	¶62	col. 5:12-25
the locking member configured to be movably supported by a frame and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier,	The Atrius device is allegedly supported by the firearm's frame (lower receiver) and has an upward extending lever arm that makes contact with the bolt carrier surface to actuate the device Compl. ¶62	¶62	col. 3:28-45
the locking member having a body portion that is movably supported and an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position.	The Atrius device is alleged to have a body portion and an upwardly extending "deflectable portion (lever arm)" Compl. ¶62 A plaintiff-generated rendering illustrates this lever arm moving separately from the body Compl. p. 32	¶62	col. 3:56-65

• Identified Points of Contention:
  • Scope Questions: For the '247 Patent, a potential point of contention is the meaning of "prevented from catching said hammer hook." A defendant may argue its device merely repositions the disconnector but does not strictly "prevent" it from catching the hammer under all conditions, raising a question of claim scope. For the '784 Patent, the dispute may center on whether the accused lever arm is "separately movable" and "deflectable" as those terms are understood in the context of the patent, or if it functions as a single, rigid unit in a way that falls outside the claim.
  • Technical Questions: A key technical question for the '784 Patent is how the accused device's "lever arm" behaves when contacted by the forward portion of the bolt carrier during its rearward cycle. The complaint alleges it deflects to allow passage Compl. ¶62 Compl. p. 32, and the evidence required to prove this specific interaction will be central to the infringement analysis.

V. Key Claim Terms for Construction

• The Term: "forces said trigger member towards said set position" (from '247 Patent, Claim 15)

• Context and Importance: This phrase is the core of the "forced reset" functionality. The definition of "forces" will be critical to determining infringement. Practitioners may focus on this term because the mechanism by which the accused device achieves reset, and whether that mechanism constitutes "forcing" as described in the patent, will likely be a central point of dispute.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification describes the general principle of the invention as using the "pivoting travel of the hammer" to force the trigger to pivot, suggesting any mechanism using this principle could be covered '247 Patent, col. 9:58-10:2
  • Evidence for a Narrower Interpretation: The figures show a specific physical interaction where a cam lobe directly contacts and pushes the trigger member '247 Patent, FIG. 9D A defendant may argue this limits the term to a direct, positive mechanical push rather than a more indirect influence.

• The Term: "upwardly extending deflectable portion that is separately movable" (from '784 Patent, Claim 1)

• Context and Importance: This term distinguishes the invention from prior art locking bars that might not be adaptable to different firearm geometries. Infringement hinges on whether the accused device's lever arm is both "deflectable" and "separately movable" from its body.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The summary of the invention describes the goal is to "deflect or fold to avoid interfering contact," suggesting a functional definition that could cover various mechanical solutions that achieve this avoidance '784 Patent, col. 2:5-12
  • Evidence for a Narrower Interpretation: The detailed description and figures show specific embodiments with a hinged structure and a pivot pin allowing the extension to pivot relative to the body ('784 Patent, FIG. 2; '784 Patent, col. 3:56-65). A defendant may argue this limits the term "deflectable" and "separately movable" to a distinct, hinged component, rather than a merely flexible or compliant part.

VI. Other Allegations

• Indirect Infringement: The complaint alleges inducement of infringement, stating that Defendants' promotional materials, websites, and instructions encourage and direct customers to install and use the accused devices in an infringing manner Compl. ¶49 Compl. ¶63 Compl. ¶77 Contributory infringement is also alleged, on the basis that the accused devices and their key components (e.g., "the cam and cam lever arm") are specially designed to practice the patents and are not suitable for substantial non-infringing uses Compl. ¶51 Compl. ¶65 Compl. ¶79
• Willful Infringement: Willfulness is alleged based on both pre-suit and post-suit knowledge. The complaint asserts pre-suit knowledge stems from a 2024 conversation in which Plaintiffs' principals allegedly informed Defendant Kirgin about the Asserted Patents and their coverage Compl. ¶23 Post-suit knowledge is based on the filing and service of the complaint itself Compl. ¶52 Compl. ¶66

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

• A core issue will be one of claim construction: how the court defines the functional requirements of the claims, such as what it means for a cam to "force" a trigger to reset ('247 Patent) and what constitutes a "separately movable deflectable portion" on a locking member ('784 Patent). These definitions will likely determine whether the accused products fall within the scope of the patents.
• A second key question will be evidentiary and factual: can Plaintiffs demonstrate that the accused devices operate in the specific manner alleged? This will involve detailed technical analysis of, for instance, whether the Atrius selector's lever arm actually deflects independently of its body to avoid bolt carrier interference, as required by the '784 Patent.
• A third central question relates to willfulness: what evidence substantiates the alleged 2024 conversation that purportedly put Defendants on notice of the patents? The details and verifiability of this alleged pre-suit notification will be critical for Plaintiffs' attempt to prove willful infringement and potentially obtain enhanced damages.