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., d/b/a Tactical Shit/ Liberal Tears/ SIGGLOCKINCOLT.COM (Missouri) and Thomas Kirgin JR. (Missouri)
  • Plaintiff’s Counsel: Stinson LLP
• Case Identification: 4:26-cv-00018, E.D. Mo., 03/24/2026
• Venue Allegations: Venue is alleged to be proper as 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 Forced Reset Selector" and "Partisan Disruptor" firearm components infringe seven U.S. patents related to forced reset trigger mechanisms.
• Technical Context: The technology at issue involves trigger mechanisms for semi-automatic firearms that use the energy from the firearm's cycling action to mechanically reset the trigger, a function intended to enable an accelerated rate of fire compared to standard triggers.
• Key Procedural History: The complaint alleges that in 2024, principals of Plaintiff ABC discussed the Asserted Patents with Defendant Kirgin, an event Plaintiffs cite as establishing pre-suit knowledge for their willful infringement allegations.

Case Timeline

Date	Event
2017-09-29	Priority Date for U.S. Patent No. 10,514,223
2019-12-24	U.S. Patent No. 10,514,223 Issued
2021-11-05	Priority Date for U.S. Patent No. 12,031,784
2022-01-10	Priority Date for U.S. Patent Nos. 11,724,003; 12,036,336; 12,274,807
2022-09-08	Priority Date for U.S. Patent Nos. 12,038,247; 12,578,159
2023-08-15	U.S. Patent No. 11,724,003 Issued
2024-01-01	Approximate date of conversation establishing alleged knowledge of patents
2024-07-09	U.S. Patent No. 12,031,784 Issued
2024-07-16	U.S. Patent No. 12,038,247 Issued
2024-07-16	U.S. Patent No. 12,036,336 Issued
2025-04-15	U.S. Patent No. 12,274,807 Issued
2026-03-17	U.S. Patent No. 12,578,159 Issued
2026-03-24	Complaint Filed

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. ¶12)

The Invention Explained

• Problem Addressed: Standard semi-automatic triggers are limited in their rate of fire because a disconnector holds the hammer after a shot until the user manually releases the trigger to reset the mechanism (Compl. ¶25). This mechanical and human-operated sequence inherently limits how quickly subsequent shots can be fired ('247 Patent, col. 1:17-31).
• The Patented Solution: The '247 Patent discloses a trigger mechanism that can be selectively switched between a standard semi-automatic mode and a "forced reset" mode (Compl. ¶27). In the forced reset mode, a pivoting "cam" is engaged; as the firearm's bolt carrier cycles, it interacts with this cam, which in turn forces the trigger member back to its reset position automatically. This action bypasses the need for the user to manually release the trigger, allowing for a more rapid firing sequence ('247 Patent, col. 2:5-24).
• Technical Importance: The invention provides a user-selectable, dual-mode functionality, allowing a firearm to operate with a conventional trigger pull or an accelerated, mechanically assisted reset cycle within a single integrated mechanism (Compl. ¶27).

Key Claims at a Glance

• The complaint asserts independent claim 15 (Compl. ¶47).
• The essential elements of claim 15 include:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam.
  • The cam is movable between a first position (for standard semi-automatic mode) and a second position (for forced reset semi-automatic mode).
  • In the standard mode (cam in first position), the disconnector hook catches the hammer hook after firing, requiring a user to manually release the trigger to reset the mechanism.
  • In the forced reset mode (cam in second position), the cam lobe forces the trigger member towards its set position, and the disconnector hook is prevented from catching the hammer hook, allowing the user to fire again without manually releasing the trigger.

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. ¶13)

The Invention Explained

• Problem Addressed: Forced reset trigger mechanisms designed for one firearm platform (e.g., an AR-15) may not be compatible with others (e.g., an AR-10) due to different internal geometries. Specifically, a locking bar designed to be actuated by the bolt carrier in one platform may be too short, or if lengthened, it may interfere with the bolt carrier as it cycles to the rear in another platform ('784 Patent, col. 1:21-44).
• The Patented Solution: The '784 Patent describes an extended trigger locking device featuring an "upwardly extending deflectable portion." This upper portion is rigid enough to be actuated by the bolt carrier when it returns to battery (unlocking the trigger), but it is also designed to "deflect or fold" out of the way when the front of the bolt carrier passes over it during its rearward cycle, thus avoiding interference ('784 Patent, abstract; '784 Patent, col. 2:1-6).
• Technical Importance: This "one-way" actuation design allows a forced reset trigger system to be adapted to multiple firearm platforms with varying internal dimensions, overcoming the geometric constraints of prior rigid designs (Compl. ¶28).

Key Claims at a Glance

• The complaint asserts independent claim 1 (Compl. ¶61).
• The essential elements of claim 1 include:
  • An extended trigger member locking device for a forced reset trigger mechanism.
  • A locking member movable between a first (locked) and second (unlocked) position, actuated by contact with a bolt carrier.
  • The locking member comprises a "movably supported" body portion and an "upwardly extending deflectable portion."
  • Crucially, this deflectable portion is "separately movable relative to the body portion" between an extended and a deflected position.

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 discloses a firearm trigger mechanism operable in two modes: a standard semi-automatic mode and a forced reset semi-automatic mode. The technology, as described in the complaint, relies on a cam that is rotated by the cycling of the firearm's action to force the trigger member to reset, functionally similar to the '247 Patent (Compl. ¶27).
• Asserted Claims: Independent claim 1 is asserted (Compl. ¶75).
• Accused Features: The "Atrius Forced Reset Selector" is accused of infringing the '159 Patent (Compl. ¶74).

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 trigger mechanism in which the cycling of the bolt carrier causes the hammer to make physical contact with the trigger member, thereby forcefully resetting both components. A separate locking bar is included to prevent the trigger from being pulled again until the bolt carrier has returned to its in-battery position ('223 Patent, abstract; Compl. ¶29).
• Asserted Claims: Independent claim 4 is asserted (Compl. ¶89).
• Accused Features: The "Partisan Disruptor" trigger assembly is accused of infringing the '223 Patent (Compl. ¶88).

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, along with the '336 and '807 patents, describes a trigger device that can be selected to operate in two distinct modes: a standard semi-automatic mode using a disconnector, and a forced reset semi-automatic mode. This dual-mode capability is a central feature of the claimed invention (Compl. ¶30; '003 Patent, abstract).
• Asserted Claims: Independent claim 4 is asserted (Compl. ¶104).
• Accused Features: The "Partisan Disruptor" is accused of infringing the '003 Patent (Compl. ¶103).

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 mechanism with selectable standard and forced reset semi-automatic modes, similar in operation to the '003 and '807 patents. The invention includes a three-position safety selector to switch between safe, standard, and forced reset modes ('336 Patent, abstract; Compl. ¶30).
• Asserted Claims: Independent claim 3 is asserted (Compl. ¶119).
• Accused Features: The "Partisan Disruptor" is accused of infringing the '336 Patent (Compl. ¶118).

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 also discloses a trigger mechanism with selectable operational modes, including a standard semi-automatic mode and a forced reset semi-automatic mode. Its operation is described in the complaint as being similar to that of the '003 and '336 patents (Compl. ¶30; '807 Patent, abstract).
• Asserted Claims: Independent claim 1 is asserted (Compl. ¶134).
• Accused Features: The "Partisan Disruptor" is accused of infringing the '807 Patent (Compl. ¶133).

III. The Accused Instrumentality

Product Identification

• The complaint identifies two accused product lines: (1) the "Three-Position 'Atrius Forced Reset Selector'" (First Infringing Device) and (2) the "Partisan Disruptor," a forced reset trigger assembly (Second Infringing Device) (Compl. ¶32; Compl. ¶37).

Functionality and Market Context

• The Atrius Forced Reset Selector is alleged to be a selector switch that enables a firearm to operate in three modes: safe, standard semi-automatic, and forced reset semi-automatic (Compl. ¶36). It is allegedly sold as a standalone component, in kits, or pre-installed in firearms (Compl. ¶34). A product photograph shows the Atrius selector, a component designed to replace a standard firearm safety selector (Compl. p. 8).
• The Partisan Disruptor is alleged to be a complete trigger assembly that also provides selectable modes, including a standard "disconnector mode" and a "forced reset mode" (Compl. ¶41). In the forced reset mode, the cycling action is alleged to reset the trigger, with a locking bar preventing out-of-battery firing (Compl. ¶42). A product photograph shows the Partisan Disruptor as a multi-part trigger assembly drop-in unit (Compl. p. 12).
• Both product lines are allegedly marketed and sold to the public through several websites operated by the Defendants (Compl. ¶33; Compl. ¶38).

IV. Analysis of Infringement Allegations

'247 Patent Infringement Allegations

The complaint provides plaintiff-generated, color-coded renderings to illustrate the alleged operation of the accused device, such as one depicting the internal components of the fire control mechanism in their "set" positions (Compl. p. 15).

Claim Element (from Independent Claim 15)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A firearm trigger mechanism comprising: ... a cam having a cam lobe and adapted to be movably mounted in the fire control mechanism pocket,	The Atrius Forced Reset Selector functions as a cam that, in at least one mode, forces the reset of the trigger and locks the trigger during the cycle of operation.	¶48	col. 2:10-15
said cam being movable between a first position and a second position, in said second position said cam lobe forces said trigger member towards said set position,	The accused cam is movable between positions. In the second position (forced reset mode), the cam lobe allegedly forces the trigger member toward the set position.	¶48	col. 2:15-18
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,	In standard mode, the cam is in its first position, and the disconnector hook catches the hammer hook after the hammer pivots rearward.	¶48	col. 2:55-61
at which time a user must manually release said trigger member to free said hammer from said disconnector to permit said hammer and trigger member to pivot to said set positions so that the user can pull said trigger	The user must manually release the trigger to reset the hammer from the disconnector before the firearm can be fired again.	¶48	col. 2:61-67
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 forced reset mode, the cam is in its second position. The cam allegedly forces the trigger toward the set position, and rearward hammer movement occurs such that the disconnector hook is prevented from catching the hammer hook.	¶48	col. 3:1-7
and thereafter the bolt carrier moves forward into battery, at which time the user can pull said trigger member to fire the firearm.	After the bolt carrier returns to battery, the user can pull the trigger to fire the firearm without first manually releasing it.	¶48	col. 3:9-13

• Identified Points of Contention:
  • Scope Questions: A primary question may be whether the accused "Atrius Forced Reset Selector" meets the claim definition of a "cam." The analysis will question if a component that also functions as a safety selector performs the specific dual functions of forcing the trigger reset and preventing disconnector engagement as recited in the claim.
  • Technical Questions: The claim requires that in forced reset mode, the cam's position results in the "disconnector hook [being] prevented from catching said hammer hook." The case may turn on evidence demonstrating the precise mechanical interaction by which the accused selector allegedly "prevents" this engagement.

'784 Patent Infringement Allegations

The complaint uses a rendering to show the alleged separate movement of the "upwardly extending deflectable portion" of the accused device relative to its body (Compl. p. 32).

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: 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 Atrius Forced Reset Selector allegedly operates as a locking member movable between a locked first position and an unlocked second position.	¶62	col. 4:1-6
the locking member... including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier, such actuating contact causing the locking member to move from the first position to the second position,	The selector has an upward extending lever arm that makes contact with the bolt carrier, causing the locking member to move from the locked to the unlocked position.	¶62	col. 4:13-23
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 Forced Reset Selector is alleged to have a main body portion and an upwardly extending lever arm (the "deflectable portion"). The complaint alleges this lever arm is designed to allow for separate movement relative to the body portion.	¶62	col. 4:40-47

• Identified Points of Contention:
  • Scope Questions: The dispute may center on the construction of "separately movable relative to the body portion." The question will be whether this requires a distinct, independent component (like a hinged arm) or if it could read on a unitary piece designed to flex.
  • Technical Questions: A key factual question will be whether the accused selector's upward-extending arm actually "deflects" or "folds" independently of the main body's rotation during the firearm's cycle. The infringement allegation rests on demonstrating this specific mechanical behavior, which distinguishes the invention from a simple rigid lever.

V. Key Claim Terms for Construction

'247 Patent

• The Term: "cam"
• Context and Importance: The identity and function of the "cam" is central to claim 15. As the accused device is a three-position safety selector, the construction of "cam" will be critical to determining if that selector performs the functions of the claimed element.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent does not provide a special definition for "cam." A party could argue for its plain and ordinary meaning: a mechanical element that transforms rotary motion into linear motion or vice-versa. The specification notes the cam's role is to force the trigger reset and interact with the disconnector, functions the accused selector is alleged to perform.
  • Evidence for a Narrower Interpretation: The figures consistently depict the cam as a distinct component that is acted upon by the safety selector and which then acts upon the trigger and disconnector ('247 Patent, FIGS. 7, 9A-9D). A party could argue that the term "cam" should be limited to this specific arrangement and does not read on a single, integrated safety selector that performs all functions itself.

'784 Patent

• The Term: "deflectable portion that is separately movable relative to the body portion"
• Context and Importance: This phrase defines the core inventive concept for adapting the locking mechanism across different firearm platforms. Infringement of claim 1 hinges on whether the accused device embodies this specific structural and functional limitation.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent abstract and summary state the invention provides a "deflectable extension" that can "deflect or fold" ('784 Patent, col. 2:2-3). This language may support a construction that encompasses various mechanisms for achieving one-way actuation, including flexing materials or hinged parts.
  • Evidence for a Narrower Interpretation: The detailed description and figures of the embodiments show a distinct "foldable extension portion 22 that pivots on... a transverse pivot pin 24 relative to the locking bar body 26" ('784 Patent, col. 3:40-44). This explicit disclosure of a hinged, pivoting component may be used to argue that "separately movable" requires a multi-piece, pinned construction, not merely the flexing of a single component.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both induced and contributory infringement. Inducement is based on allegations that Defendants provide promotional materials and instructions on their websites that encourage and teach customers how to install and use the accused products in an infringing manner (Compl. ¶49; Compl. ¶63; Compl. ¶77). Contributory infringement is based on allegations that the components are specially designed for infringing use and have no substantial non-infringing purpose (Compl. ¶51; Compl. ¶65; Compl. ¶79).
• Willful Infringement: Willfulness is alleged based on pre-suit knowledge. The complaint asserts that in 2024, principals of Plaintiff ABC had a conversation with Defendant Kirgin where they specifically discussed the Asserted Patents and their coverage, thereby putting Defendants on notice of the infringement (Compl. ¶23; Compl. ¶52; Compl. ¶66).

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

• Definitional Scope and Structure: A primary issue will be one of definitional scope: can the term "cam" as used in the '247 Patent be construed to cover the accused multi-function safety selector? Similarly, does the accused selector's lever arm embody the "separately movable... deflectable portion" claimed in the '784 Patent, or is there a fundamental structural mismatch?
• Mechanism of Action: A key evidentiary question will be one of technical operation: what is the precise mechanism by which the accused devices operate? The case will likely require expert testimony and analysis to determine whether the accused selector "prevents" disconnector engagement as claimed in the '247 Patent, and whether its upper arm truly "deflects" independently of the body's primary rotation as claimed in the '784 Patent.
• Pre-Suit Knowledge and Intent: The allegation of a direct, pre-suit conversation discussing the patents-in-suit raises a significant factual question regarding willfulness. The details and evidence surrounding this alleged 2024 conversation will be a focal point for determining whether Defendants acted with the requisite knowledge and intent to support a finding of willful infringement and potential enhanced damages.