ABC IP LLC v. Bear Arms

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas); and RBTM LLC (Wyoming)
  • Defendant: Bear Arms d/b/a Bear Arms Co. (Missouri); and Nathan Murrell (an individual)
  • Plaintiff's Counsel: Stinson LLP; Fish & Richardson P.C.; Wood Herron & Evans LLP
• Case Identification: 6:26-cv-03338, W.D. Mo., 06/12/2026
• Venue Allegations: Venue is alleged to be proper as Defendants reside in, have committed acts of infringement in, and maintain a regular and established place of business in the district.
• Core Dispute: Plaintiffs allege that Defendants' "Atrius Selector" firearm accessory infringes four patents related to "forced reset" trigger mechanisms for semi-automatic firearms.
• Technical Context: The technology concerns firearm trigger mechanisms that use the cycling of the firearm's action to mechanically reset the trigger, a design intended to enable an increased rate of fire.
• Key Procedural History: The complaint does not allege any significant pre-suit procedural history, such as prior litigation between the parties or administrative challenges to the asserted patents.

Case Timeline

Date	Event
2020	Plaintiffs allege use of "FRT" trademark began.
2021-11-05	U.S. Patent No. 12,031,784 Priority Date
2022-01-10	U.S. Patent No. 12,636,403 Priority Date
2022-09-08	U.S. Patent No. 12,038,247 Priority Date
2022-09-08	U.S. Patent No. 12,578,159 Priority Date
2024-07-09	U.S. Patent No. 12,031,784 Issue Date
2024-07-16	U.S. Patent No. 12,038,247 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
2026-06-12	Complaint Filing Date

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

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

• Issued: July 16, 2024

The Invention Explained

• Problem Addressed: The patent background describes the desire among shooters to increase the rate of semi-automatic fire beyond what is possible with standard trigger mechanisms, which require a full manual release and reset cycle US12038247B2, col. 1:31-54 It also notes that prior art attempts to achieve this, particularly for AR-pattern firearms, may require undesirable modifications to core components like the bolt carrier US 12,038,247 B2, col. 1:55-65
• The Patented Solution: The invention is a "drop-in" trigger module featuring a three-position safety selector (safe, standard semi-automatic, and forced reset semi-automatic) US 12,038,247 B2, abstract In the "forced reset" mode, the rearward movement of the firearm's bolt carrier pivots a cam, which in turn mechanically forces the trigger member back to its set position US 12,038,247 B2, col. 2:56-62 The safety selector simultaneously prevents the disconnector from catching the hammer, which allows the user to fire again immediately upon the action returning to battery, without needing to manually release the trigger first US 12,038,247 B2, abstract
• Technical Importance: The technology aims to provide a selectable, accelerated rate of fire in a standard semi-automatic firearm via a retrofittable module that does not require modification of the host firearm's bolt carrier assembly US 12,038,247 B2, col. 2:20-30

Key Claims at a Glance

• The complaint asserts independent claim 15 Compl. ¶40
• Key elements of claim 15 include:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam with a cam lobe.
  • The cam is pivotable between a first position and a second position, where in the second position the cam lobe "forces said trigger member towards said set position."
  • The mechanism is operable in a "standard semi-automatic mode" where the user "must manually release said trigger member to free said hammer from said disconnector."
  • The mechanism is also operable in a "forced reset semi-automatic mode" where the "disconnector hook is prevented from catching said hammer hook," allowing the user to fire again without a manual trigger release.
• The complaint reserves the right to assert additional claims Compl. ¶40

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

• Issued: July 9, 2024

The Invention Explained

• Problem Addressed: The patent explains that a forced reset trigger designed for one weapons platform (e.g., an AR-15) may be inoperable in another (e.g., an AR-10) due to different internal geometries US12031784B1, col. 1:21-32 Specifically, a locking member long enough to be actuated by the bolt carrier might also interfere with another part of that same carrier as it cycles, rendering the device inoperable US 12,031,784 B1, col. 1:38-44
• The Patented Solution: The patent proposes a locking device with an "upwardly extending deflectable portion" US 12,031,784 B1, abstract This extension is designed to be actuated by the bolt carrier's forward movement but also to "deflect or fold" to allow the bolt carrier to pass without interference as it cycles to the rear US 12,031,784 B1, col. 2:1-11 The specification illustrates this concept with a one-way hinged lever arm that pivots out of the way when contacted from one direction but remains rigid when contacted from another US 12,031,784 B1, col. 3:52-60 US 12,031,784 B1, FIG. 7
• Technical Importance: This invention provides a solution for adapting forced reset trigger technology across different firearm platforms that have similar operating principles but varying component dimensions US 12,031,784 B1, col. 1:45-49

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶54
• Key elements of claim 1 include:
  • An extended trigger member locking device for a forced reset trigger mechanism.
  • A locking member movable between a first (locking) and second (unlocked) position.
  • The locking member has a "body portion" and an "upwardly extending deflectable portion."
  • The "deflectable portion" is "separately movable relative to the body portion between an extended position and a deflected position."
• The complaint reserves the right to assert additional claims Compl. ¶54

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

• Issued: March 17, 2026
• Technology Synopsis: The patent describes a firearm trigger mechanism operable in two modes: a standard semi-automatic mode and a "forced reset" semi-automatic mode Compl. ¶23 US12578159B2, claim 1 The invention addresses the goal of accelerating the firing sequence by using a cam, rotated by the cycling of the bolt, to mechanically reset the trigger member, bypassing the need for a manual trigger release in the forced reset mode Compl. ¶23 US 12,578,159 B2, col. 1:20-55
• Asserted Claims: Claim 1 Compl. ¶68
• Accused Features: The "Atrius Selector" is alleged to be a trigger mechanism that operates in both a standard and a forced reset semi-automatic mode, thereby embodying the claimed invention Compl. ¶¶69-70

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

• Issued: May 26, 2026
• Technology Synopsis: The patent claims a forced reset trigger mechanism where the cycling of the firearm's action causes the hammer to forcefully reset the trigger member Compl. ¶26 It also features a safety selector for switching between a standard semi-automatic mode and a "forced reset" semi-automatic mode US12636403B2, claim 38 This design is presented as an improvement for providing a selectable, mechanically assisted rate of fire US 12,636,403 B2, col. 1:20-25
• Asserted Claims: Claim 38 Compl. ¶82
• Accused Features: The "Atrius Selector" is accused of infringing by being a forced reset trigger mechanism with a safety selector that is movable between a standard and a forced reset position (Compl. ¶¶82; Compl. ¶84).

III. The Accused Instrumentality

Product Identification

The accused product is the "(3-Position) Atrius Development 3-Position Forced Reset Selector," referred to as the "Atrius Selector" Compl. ¶29

Functionality and Market Context

The complaint alleges that the Atrius Selector is an aftermarket trigger component for AR-15 platform firearms Compl. ¶31 It is alleged to be capable of operating in a "disconnector mode," similar to a standard semi-automatic trigger, as well as a "forced reset" semi-automatic mode Compl. ¶32 The complaint provides a screenshot from the Defendants' website showing the product marketed as a "3 Position Forced Reset Selector" Compl. ¶31 This visual shows the Atrius Selector as a single, self-contained trigger assembly offered for sale Compl. ¶31

IV. Analysis of Infringement Allegations

U.S. Patent No. 12,038,247 Infringement Allegations

Claim Element (from Independent Claim 15)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a hammer having a sear catch and a hook for engaging a disconnector...	The Atrius Selector is alleged to be installed and used with a hammer (depicted in red) that has a sear catch and a hook for engaging a disconnector.	¶42	col. 7:45-49
a trigger member having a sear... to pivot... between set and released positions,	The Atrius Selector is alleged to be installed with a trigger member (depicted in brown) that has a sear and pivots between set and released positions.	¶42	col. 7:50-56
and a cam having a cam lobe and adapted to be movably mounted in the fire control mechanism pocket,	The Atrius Selector itself is alleged to be the claimed "cam and lever," which is movably mounted in the fire control pocket.	¶42	col. 8:1-12
in said second position said cam lobe forces said trigger member towards said set position,	In the "forced reset" mode, the cam lobe of the Atrius Selector allegedly moves the trigger member toward the set position. The complaint includes a rendering of this alleged action Compl. ¶42, p. 15	¶42	col. 9:4-8
whereupon in a forced reset semi-automatic mode... said disconnector hook is prevented from catching said hammer hook,	In the "forced reset" mode, the rearward movement of the bolt carrier allegedly causes hammer pivoting such that the disconnector hook is prevented from catching the hammer hook.	¶42	col. 8:55-65

• Identified Points of Contention:
  • Scope Questions: A central question may be whether the accused "Atrius Selector" constitutes the claimed "cam" with a "cam lobe." The infringement theory appears to map the entire accused product to this single claim element, which may raise questions about the correspondence between the claimed component and the accused structure.
  • Technical Questions: Claim 15 requires a multi-step operation involving both a cam that "forces" the trigger reset and a safety selector that "prevents" the disconnector from catching the hammer. A key factual dispute will likely be whether the accused Atrius Selector performs these exact functions in the sequence and manner required by the claim. The complaint's infringement theory relies on plaintiff-generated renderings, and the actual mechanical operation of the accused device will be subject to examination.

U.S. Patent No. 12,031,784 Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a locking member that is movable between a first position in which it locks a trigger... and a second position where it does not restrict movement...	The Atrius Selector is alleged to operate as a locking member, moving between a first position that locks the trigger and a second that does not.	¶56	col. 2:53-58
and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier,	The Atrius Selector is alleged to have an upward extending lever arm (depicted in yellow) that makes actuating contact with the bolt carrier.	¶56	col. 2:59-62
an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position.	The Atrius Selector is alleged to have an upwardly extending lever arm that is "separately movable" from its body, deflecting to allow the bolt carrier to pass. The complaint includes a rendering illustrating the alleged deflection Compl. ¶56, p. 27	¶56	col. 3:2-7

• Identified Points of Contention:
  • Technical Questions: The infringement analysis for the '784 patent will likely focus on the physical construction of the accused Atrius Selector. The critical question is whether its upward-extending arm is in fact "separately movable relative to the body portion," as claimed. Evidence will need to establish if the accused device has a hinge, flex point, or other mechanism that allows for such separate movement, or if it is a rigid, unitary component whose movement would not meet this limitation. The complaint's use of color-coded renderings to distinguish the "body portion" from the "deflectable portion" suggests this will be a central point of dispute.

V. Key Claim Terms for Construction

For U.S. Patent No. 12,038,247

• The Term: "forces said trigger member towards said set position" (from claim 15)
• Context and Importance: This term is critical to defining the "forced reset" function. The dispute will likely center on what level and type of action constitute "forcing." Practitioners may focus on this term because its construction will determine whether a mechanism that merely assists, enables, or unblocks a spring-driven reset falls within the scope of a claim requiring a component to affirmatively "force" the reset.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification describes the function in general terms, stating the cam "acts upon the cam follower 58 to the pivot trigger member 38 counter-clockwise," which could be interpreted to cover a range of mechanical actions that result in the trigger moving to the set position US 12,038,247 B2, col. 9:6-8
  • Evidence for a Narrower Interpretation: The detailed description and figures show a specific embodiment where the cam lobe (78) makes direct, positive contact with the cam follower (58) on the trigger, creating a direct mechanical push US 12,038,247 B2, FIG. 8C US 12,038,247 B2, col. 9:6-8 A party could argue that "forces" should be limited to this direct, positive mechanical actuation, as distinguished from simply removing a block and allowing a spring to perform the reset.

For U.S. Patent No. 12,031,784

• The Term: "separately movable relative to the body portion" (from claim 1)
• Context and Importance: This term is the central inventive concept of the '784 patent, designed to solve the problem of cross-platform compatibility. The entire infringement allegation for this patent rests on whether the accused device's lever is "separately movable."
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification states the invention provides a "deflectable extension" that can "deflect or fold" US 12,031,784 B1, col. 2:1-9 This language may support an interpretation that includes various types of movement, not just pivoting on a pin.
  • Evidence for a Narrower Interpretation: Both illustrated embodiments show a distinct "upward extension portion" (22, 50) that pivots on a physical pin (24, 54) relative to the "body portion" (26, 52) US 12,031,784 B1, FIG. 2 US 12,031,784 B1, FIG. 8 A party might argue that "separately movable" should be construed as requiring two distinct components joined by a pivot, consistent with all disclosed embodiments, and would not read on, for instance, a single, flexible component that bends.

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 website that encourage and instruct customers to install and use the Atrius Selector in an infringing manner Compl. ¶43 Compl. ¶57 Compl. ¶71 Compl. ¶85 Contributory infringement is alleged on the grounds that the Atrius Selector's components are specially designed for use in an infringing system and are not suitable for substantial noninfringing use Compl. ¶45 Compl. ¶59 Compl. ¶73 Compl. ¶87
• Willful Infringement: Willfulness is alleged for all four asserted patents. The allegations are based on Defendants having "known or should have known" that their actions constituted infringement and that the patents are valid, and that Defendants could not have had a reasonable belief to the contrary Compl. ¶46 Compl. ¶60 Compl. ¶74 Compl. ¶88 The complaint does not specify whether the alleged knowledge was pre- or post-suit.

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

• A primary issue for the '784 patent will be one of technical construction and definition: does the accused Atrius Selector contain an arm or lever that is "separately movable relative to the body portion," as required by the claim? The resolution will depend on a factual analysis of the accused product's design and a legal construction of what it means for a component to be "separately movable."
• A central question for the '247, '159, and '403 patents will be one of functional operation: do the accused device's selectable modes operate through the specific sequence of mechanical interactions claimed in the patents? The case will likely examine whether the accused product's "forced reset" is achieved by a "cam" that "forces" the trigger to reset while the "safety selector" simultaneously "prevents" the disconnector from engaging the hammer, or if it achieves a similar outcome through a different, non-infringing method.
• A key evidentiary matter will be the accuracy of the complaint's technical diagrams: the infringement allegations rely heavily on plaintiff-generated, color-coded renderings of the accused product. A threshold battle may be fought over whether these diagrams are an accurate representation of the Atrius Selector's actual components and their mechanical interactions, or if they are argumentative characterizations designed to fit the patent claims.