ABC IP LLC v. 2a Ninja LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas); RBTM LLC
  • Defendant: 2A Ninja LLC (Missouri); Ethan Alexander Cook (Individual)
  • Plaintiff's Counsel: Stinson LLP
• Case Identification: ABC IP, LLC v. 2A Ninja LLC, 4:26-cv-01106, E.D. Mo., 05/29/2026
• Venue Allegations: Venue is alleged to be proper as Defendants reside in the district and/or have a regular and established place of business in the district.
• Core Dispute: Plaintiffs allege that Defendants' "Disruptor" trigger assembly, a firearm component, infringes five patents related to forced reset trigger mechanisms.
• Technical Context: The technology concerns firearm trigger mechanisms, specifically "forced reset triggers" for AR-15-style semi-automatic firearms, which use the energy from the weapon's cycling action to reset the trigger, potentially enabling a faster rate of fire than standard trigger designs.
• Key Procedural History: The complaint alleges that the manufacturer of the accused product maintains a "Legal Library" on its website that includes links to three of the patents-in-suit, which Plaintiffs may use to support allegations of pre-suit knowledge and willful infringement.

Case Timeline

Date	Event
2017-09-29	'223 Patent Priority Date
2019-12-24	'223 Patent Issue Date
2022-01-10	'003, '336, '807, '403 Patents Priority Date
2023-08-15	'003 Patent Issue Date
2024-07-16	'336 Patent Issue Date
2025-04-15	'807 Patent Issue Date
2026-05-26	'403 Patent Issue Date
2026-05-29	Complaint Filing Date

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

U.S. Patent No. 10,514,223

• Patent Identification: U.S. Patent No. 10,514,223 ("the '223 Patent"), "Firearm Trigger Mechanism," issued December 24, 2019.
• The Invention Explained:
  • Problem Addressed: The patent's background describes that in standard semi-automatic firearms, the rate of fire is limited by the user's ability to manually release and reset the trigger after each shot ʼ223 Patent, col. 1:25-35 Techniques like "bump firing" to increase fire rate are also noted ʼ223 Patent, col. 1:41-54
  • The Patented Solution: The invention is a trigger mechanism where the hammer, as it is pushed rearward by the cycling bolt carrier, makes contact with the trigger member and forces it back to the reset position ʼ223 Patent, col. 5:23-48 A separate "locking bar" is included as a safety feature; it blocks the trigger from being pulled again until the bolt carrier has returned to its "substantially in-battery position," which prevents the hammer from falling before the chamber is properly closed ʼ223 Patent, abstract ʼ223 Patent, col. 5:49-67
  • Technical Importance: The invention offers a mechanical, "drop-in" trigger module that can increase the potential rate of fire for common firearm platforms without requiring complex electronics or potentially unreliable shooting techniques ʼ223 Patent, col. 2:25-45
• Key Claims at a Glance:
  • The complaint asserts independent claim 4 Compl. ¶37
  • The essential elements of independent claim 4 include:
    • A housing with openings for hammer and trigger pins.
    • A hammer with a sear notch, pivotally mounted in the housing.
    • A trigger member with a sear, pivotally mounted in the housing.
    • The trigger member has a surface that is contacted by the hammer during cycling, causing the trigger member to be "forced to the set position."
    • A "locking bar" is pivotally mounted in the housing and spring-biased to a first position where it "mechanically blocks the trigger member."
    • The locking bar is movable to a second position when contacted by the bolt carrier reaching a "substantially in-battery position," allowing the trigger to be moved.
  • The complaint does not explicitly reserve the right to assert other claims but makes general allegations of infringing "one or more claims" Compl. ¶37

U.S. Patent No. 11,724,003

• Patent Identification: U.S. Patent No. 11,724,003 ("the '003 Patent"), "Firearm Trigger Mechanism," issued August 15, 2023.
• The Invention Explained:
  • Problem Addressed: The patent notes the existence of prior forced reset triggers and seeks to provide "further improvement" by adding modularity in function ʼ003 Patent, col. 2:21-22
  • The Patented Solution: The patent describes a trigger mechanism featuring a three-position safety selector that allows the user to choose between "safe, standard semi-automatic, and forced reset semi-automatic positions" ʼ003 Patent, abstract In the "standard" mode, a disconnector operates conventionally, catching the hammer and requiring the user to release the trigger to reset it ʼ003 Patent, col. 3:5-12 In the "forced reset" mode, the safety selector physically prevents the disconnector from engaging the hammer, thereby enabling the forced reset function where the hammer's movement resets the trigger ʼ003 Patent, col. 3:13-24
  • Technical Importance: This invention integrates both a conventional semi-automatic trigger action and a forced reset action into a single "drop-in" unit, giving the user the ability to select the mode of operation ʼ003 Patent, col. 2:29-37
• Key Claims at a Glance:
  • The complaint asserts independent claim 4 Compl. ¶51
  • The essential elements of independent claim 4 include:
    • A housing, hammer, trigger member, disconnector, and locking member.
    • A safety selector that pivots between "safe, standard semi-automatic, and forced reset semi-automatic positions."
    • A functional description of the "standard semi-automatic position" where the disconnector hook catches the hammer hook and the user must manually release the trigger to fire again.
    • A functional description of the "forced reset semi-automatic position" where the hammer's pivoting forces the trigger to its set position, the safety selector prevents the disconnector from catching the hammer hook, and the user can pull the trigger again "without manually releasing" it.
  • The complaint alleges infringement of "one or more claims," including but not limited to claim 4 Compl. ¶51

Multi-Patent Capsule: U.S. Patent No. 12,036,336

• Patent Identification: U.S. Patent No. 12,036,336 ("the '336 Patent"), "Firearm Trigger Mechanism," issued July 16, 2024.
• Technology Synopsis: The '336 Patent describes a trigger mechanism with a safety selector that enables switching between a standard semi-automatic mode and a forced reset mode '336 Patent, abstract A key feature is the configuration of the safety selector, which, in the forced reset position, repositions the disconnector to prevent it from catching the hammer hook, thereby enabling the forced reset functionality '336 Patent, col. 11:35-41
• Asserted Claims: Independent claim 3 is asserted Compl. ¶65
• Accused Features: The complaint alleges that the Disruptor's three-position selector, which allows a user to switch between a standard semi-automatic mode and a forced reset mode, infringes the '336 Patent (Compl. ¶27; Compl. ¶28; Compl. ¶29; Compl. ¶30).

Multi-Patent Capsule: U.S. Patent No. 12,274,807

• Patent Identification: U.S. Patent No. 12,274,807 ("the '807 Patent"), "Firearm Trigger Mechanism," issued April 15, 2025.
• Technology Synopsis: The '807 Patent discloses a firearm trigger mechanism with a three-position safety selector for safe, standard semi-automatic, and forced reset modes '807 Patent, abstract The invention details the mechanical interactions in both firing modes, including the engagement of the disconnector in standard mode and the prevention of that engagement by the safety selector in forced reset mode, which allows the hammer's movement to reset the trigger '807 Patent, abstract
• Asserted Claims: Independent claim 1 is asserted Compl. ¶79
• Accused Features: The allegations target the Disruptor trigger's dual-mode functionality, where the safety selector dictates whether the trigger operates in a standard semi-automatic fashion or a forced reset fashion (Compl. ¶27; Compl. ¶28; Compl. ¶29; Compl. ¶30).

Multi-Patent Capsule: U.S. Patent No. 12,636,403

• Patent Identification: U.S. Patent No. 12,636,403 ("the '403 Patent"), "Firearm Trigger Mechanism," issued May 26, 2026.
• Technology Synopsis: The '403 Patent claims a forced reset trigger mechanism with a safety selector that moves between a standard semi-automatic and a forced reset position '403 Patent, claim 38 It specifically describes the standard mode, wherein after the hammer pivots past the disconnector hook, "rearward pressure on the trigger member must be reduced to permit the trigger member to then be actuated to fire a firearm" '403 Patent, claim 38
• Asserted Claims: Independent claim 38 is asserted Compl. ¶93
• Accused Features: The complaint targets the Disruptor's "disconnector mode," which is alleged to operate like a standard AR-15 trigger and require the user to release the trigger to reset it, in contrast to its forced reset mode Compl. ¶27 Compl. ¶29 Compl. ¶95

III. The Accused Instrumentality

• Product Identification: The accused instrumentality is the "Disruptor," a forced reset trigger assembly that includes a three-position safety selector Compl. ¶24
• Functionality and Market Context: The complaint alleges the Disruptor is designed for AR-15 pattern firearms and sold by Defendants as a standalone product and pre-installed in firearms Compl. ¶25 Its core functionality is the ability to operate in two different modes, selected by the user via the safety selector Compl. ¶27 The first mode is a "disconnector mode," which allegedly functions like a standard semi-automatic trigger where the user must release the trigger to reset the firing mechanism Compl. ¶27 Compl. ¶29 The second is a "forced reset mode," in which the cycling of the firearm's action "causes hammer contact with the trigger member to forcefully reset the hammer and trigger member" Compl. ¶28 A plaintiff-generated rendering in the complaint illustrates the accused trigger assembly and its component parts Compl. ¶26 The complaint does not contain specific allegations about the product's market share or commercial success beyond the fact that it is offered for sale Compl. ¶25

IV. Analysis of Infringement Allegations

'223 Patent Infringement Allegations

Claim Element (from Independent Claim 4)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a housing having transversely aligned pairs of openings for receiving hammer and trigger assembly pins;	The Disruptor includes a housing with transversely aligned pairs of openings for receiving the hammer and trigger pins.	¶39	col. 4:1-11
a hammer having a sear notch and mounted in the housing to pivot on a transverse axis between set and released positions;	The Disruptor includes a hammer with a sear notch mounted in the housing to pivot.	¶39	col. 4:12-29
a trigger member having a sear and mounted in the housing to pivot on a transverse axis between set and released positions,	The Disruptor has a trigger member with a sear mounted in the housing to pivot.	¶39	col. 3:51-67
the trigger member having a surface positioned to be contacted by the hammer when the hammer is displaced by the bolt carrier when cycled, the contact causing the trigger member to be forced to the set position;	The trigger member has a surface that is contacted by the hammer during cycling, which causes the trigger to be forced to the set position. A diagram shows the alleged contact surfaces Compl. ¶39, p. 13	¶39	col. 5:23-48
a locking bar pivotally mounted in the housing and spring biased toward a first position in which the locking bar mechanically blocks the trigger member from moving to the released position,	The Disruptor includes a locking bar that is pivotally mounted and spring biased to a first position where it mechanically blocks the trigger. A diagram identifies this component as the "Locking Bar" Compl. ¶39, p. 14	¶39	col. 5:1-9
and movable against the spring bias to a second position when contacted by the bolt carrier reaching a substantially in-battery position in which the trigger member can be moved by an external force to the released position.	The locking bar is movable to a second position when contacted by the bolt carrier as it reaches an in-battery position, allowing the trigger to be pulled.	¶39	col. 5:16-22

'003 Patent Infringement Allegations

Claim Element (from Independent Claim 4)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a safety selector adapted to be mounted...to pivot between safe, standard semi-automatic, and forced reset semi-automatic positions,	The Disruptor includes a safety selector that pivots between safe, standard semi-automatic, and forced reset semi-automatic positions. An image identifies this "Safety Selector" Compl. ¶53, p. 27	¶53	col. 9:1-10
whereupon in said standard semi-automatic 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...	While in the standard semi-automatic position, the bolt carrier's movement causes the hammer to pivot and the disconnector hook catches the hammer hook.	¶53	col. 9:26-34
whereupon in said forced reset semi-automatic position, rearward movement of the bolt carrier causes rearward pivoting of said hammer causing said trigger member to be forced to said set position,	When in the forced reset semi-automatic position, the bolt carrier's movement causes the hammer to pivot, which in turn forces the trigger to the set position.	¶53	col. 9:39-44
said safety selector preventing said disconnector hook from catching said hammer hook,	The safety selector prevents the disconnector hook from catching the hammer hook.	¶53	col. 9:44-46
and thereafter when the bolt carrier reaches the substantially in-battery position the user can pull said trigger member to fire the firearm without manually releasing said trigger member.	When the bolt carrier is in battery, the user can pull the trigger without first manually releasing pressure.	¶53	col. 9:46-50

• Identified Points of Contention:
  • Technical Question: The core of the infringement allegation for all asserted patents rests on the claim that the cycling hammer "forcefully reset[s]" or "cause[s]" the trigger to reset Compl. ¶28 A central evidentiary question for the court will be whether the mechanical interaction in the accused Disruptor trigger functions as claimed, or if the reset occurs via a different or non-infringing mechanism. The complaint illustrates this with diagrams, but the actual forces and component interactions will be a focal point.
  • Scope Question: The claims in the '223 and '003 Patents require the locking bar to release the trigger when the bolt carrier reaches a "substantially in-battery position." The precise definition of "substantially" could become a point of contention, as it relates directly to the device's safety and operational timing. The analysis will question what degree of battery is "substantial" and whether the accused product meets that threshold.
  • Technical Question: For the patents claiming selectable modes (e.g., the '003 Patent), a key technical question will be whether the accused safety selector performs the specific function of "preventing the disconnector hook from catching said hammer hook" in the forced reset mode, as required by the claim.

V. Key Claim Terms for Construction

Term 1: "forced to the set position"

• The Term: "forced to the set position" (from '223 Patent, claim 4) and similar language in other asserted claims.
• Context and Importance: This term is the functional heart of the "forced reset" invention. The dispute may turn on whether the interaction between the hammer and trigger in the accused device constitutes being "forced" as the patent contemplates. Practitioners may focus on this term because the nature and directness of the force required for infringement will be a critical issue.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification describes the reset as occurring through "mechanical interference or contact" between the hammer and trigger ʼ223 Patent, col. 5:32-37 This language may support a construction where any contact that results in a reset, regardless of the precise vector or magnitude of force, meets the limitation.
  • Evidence for a Narrower Interpretation: The abstract states "the contact causing the trigger member to be forced to the set position," and the summary of invention notes that the cycling "causes the trigger to be forcibly reset by contact" ʼ223 Patent, abstract ʼ223 Patent, col. 2:40-42 This language, using "forcing" and "forcibly," may support a narrower construction requiring a specific, directed, and non-incidental application of force from the hammer to the trigger.

Term 2: "locking bar"

• The Term: "locking bar" (from '223 Patent, claim 4 and '003 Patent, claim 4).
• Context and Importance: This component is the primary safety mechanism claimed to prevent out-of-battery firing. The infringement analysis will depend on whether the corresponding component in the accused "Disruptor" meets all the structural and functional limitations of the claimed "locking bar."
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: Claim 4 of the '223 Patent defines the term functionally as a pivotally mounted, spring-biased element that "mechanically blocks the trigger member" and is released by contact with the bolt carrier. Any component performing these functions could fall within the scope of the term.
  • Evidence for a Narrower Interpretation: The specification describes a specific embodiment where the locking bar is "carried on a frame" and has an upper end that extends "above the upper edge of the housing" to be engaged by the bolt carrier ʼ223 Patent, col. 4:62-67 Defendants may argue that the term should be limited to a structure with these characteristics, as depicted in figures such as Figure 3 of the '223 Patent.

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 use the infringing features of the Disruptor Compl. ¶40 Compl. ¶54 Contributory infringement is based on the allegation that the Disruptor has no substantial non-infringing use and is specially designed to be used in an infringing manner Compl. ¶42 Compl. ¶56
• Willful Infringement: Willfulness is alleged based on Defendants' purported knowledge of the patents-in-suit. The complaint specifically alleges that the manufacturer of the Disruptor, Partisan Triggers (now The Triggered Company), maintains a webpage titled "FRT Legal Library" that links to copies of the '223, '003, and '336 patents Compl. ¶31 The complaint further alleges that Defendant Cook, as a principal of 2A Ninja, had access to and knowledge of this library, providing a basis for pre-suit knowledge Compl. ¶32 Compl. ¶34

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

• A core issue will be one of claim construction and function: can the phrase "forced to the set position" be interpreted to read on the specific mechanical interaction between the hammer and trigger in the accused Disruptor device? The case will require a detailed evidentiary analysis of whether the accused product's reset mechanism operates by the same principle of "force" as that disclosed and claimed in the patents.
• A second key question will involve the interaction of selectable modes: for the later patents that claim multi-mode triggers, does the accused Disruptor's safety selector perform the precise functions recited in the claims, such as physically preventing the disconnector from engaging the hammer in "forced reset" mode while allowing it to function conventionally in "standard" mode?
• Finally, the allegation of willful infringement appears to be a significant element of the case from the outset. A central question for the court will be whether Plaintiffs can prove that the "Legal Library" maintained by the product's manufacturer establishes pre-suit knowledge of the patents and a deliberate disregard for Plaintiffs' patent rights on the part of the named Defendants.