ABC IP LLC v. Grabagun LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas); RBTM LLC (Wyoming)
  • Defendant: GrabAGun, LLC (Texas)
  • Plaintiff's Counsel: Fish & Richardson P.C.; Wood Herron & Evans LLP
• Case Identification: 3:26-cv-01903, N.D. Tex., 06/09/2026
• Venue Allegations: Venue is alleged to be proper as the Defendant resides in the district and has a regular and established place of business there.
• Core Dispute: Plaintiffs allege that Defendant's aftermarket firearm triggers and selectors infringe eight U.S. patents related to "forced reset" trigger mechanisms for semi-automatic firearms.
• Technical Context: The technology concerns trigger mechanisms designed to increase the potential rate of fire of a semi-automatic firearm by using the action's cycling to mechanically reset the trigger, bypassing the need for the user to manually release and reset it between shots.
• Key Procedural History: The complaint states that Plaintiff ABC IP, LLC is the owner by assignment of the asserted patents, and Plaintiff Rare Breed Triggers, Inc. is the exclusive licensee. The complaint also includes counts for federal and common law trademark infringement related to the "FRT" mark.

Case Timeline

Date	Event
2019-12-24	U.S. Patent No. 10,514,223 Issued
2022-09-08	U.S. Patent No. 12,038,247 Priority Date
2023-08-15	U.S. Patent No. 11,724,003 Issued
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
2026-05-26	U.S. Patent No. 12,636,403 Issued
2026-06-09	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 Compl. ¶51

The Invention Explained

• Problem Addressed: In a standard semi-automatic firearm, a disconnector holds the hammer after firing until the user manually releases the trigger to reset the sear, a process that limits the potential rate of fire Compl. ¶¶23-24 '247 Patent, col. 1:21-41
• The Patented Solution: The invention is a trigger mechanism, adaptable for AR-pattern firearms, with a three-position selector: "safe," "standard semi-automatic," and "forced reset semi-automatic" '247 Patent, abstract In the "forced reset" mode, the rearward movement of the firearm's bolt carrier interacts with a cam, which in turn forces the trigger member back to its set position '247 Patent, col. 4:1-12 This allows the user to fire a subsequent shot by pulling the trigger again without having to first manually release it, enabling a faster firing sequence '247 Patent, abstract
• Technical Importance: The technology provides a mechanical method to increase the cyclic rate of fire for a semi-automatic weapon platform while operating within the "one shot per trigger pull" framework Compl. ¶25 '247 Patent, col. 1:42-45

Key Claims at a Glance

• The complaint asserts independent claim 15 '247 Patent, claim 15 Compl. ¶51
• The essential elements of independent claim 15 include:
  • A firearm trigger mechanism with 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 standard mode, the disconnector catches the hammer, and the user must manually release the trigger to reset and fire again.
  • In forced reset mode, the cam forces the trigger to reset as the bolt carrier cycles, and the disconnector hook is prevented from catching the hammer, allowing the user to fire again without a manual trigger release.
• The complaint reserves the right to assert other claims, including under the doctrine of equivalents Compl. ¶51

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

• Issued: July 9, 2024 Compl. ¶65

The Invention Explained

• Problem Addressed: The complaint alleges that prior art trigger designs suffered from "geometric limitations" that restricted their use across varied semi-automatic firearm platforms Compl. ¶27
• The Patented Solution: The '784 Patent discloses an "extended trigger member locking mechanism" for a forced reset trigger Compl. ¶27 A key feature is a "deflectable extension of the locking member" that is actuated by the bolt carrier's movement. This allows a portion of the locking member to "deflect or fold separately from the body portion," which is alleged to overcome the geometric constraints of prior designs Compl. ¶27
• Technical Importance: This innovation is alleged to allow for a locking mechanism that is more adaptable to different semi-automatic firearm designs Compl. ¶27

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶65
• The essential elements of independent claim 1 include:
  • An extended trigger member locking device for a forced reset trigger mechanism.
  • A locking member movable between a first locked position and a second unlocked position.
  • The locking member includes a body portion and an "upwardly extending deflectable portion that is separately movable" relative to the body portion.
• The complaint reserves the right to assert other claims, including under the doctrine of equivalents Compl. ¶65

Multi-Patent Capsule: U.S. Patent No. 12,578,159

• Patent Identification: U.S. Patent No. 12,578,159, issued March 17, 2026 Compl. ¶12
• Technology Synopsis: The complaint describes the '159 Patent as providing a "novel device for accelerating the firing sequence" of a semi-automatic firearm Compl. ¶26 The device is selectable between a standard semi-automatic mode and a "forced reset" mode and uses a cam rotated by the cycling action to reset the trigger Compl. ¶26
• Asserted Claims: The complaint asserts independent claim 1 Compl. ¶79
• Accused Features: The "Atrius Selector" is accused of infringing the '159 Patent Compl. ¶79

Multi-Patent Capsule: U.S. Patent No. 10,514,223

• Patent Identification: U.S. Patent No. 10,514,223, issued December 24, 2019 Compl. ¶13
• Technology Synopsis: The '223 Patent is described as claiming a device where the cycling of the firearm's action "causes hammer contact with the trigger member to mechanically reset the hammer and trigger member" Compl. ¶29 A "locking bar" prevents the trigger from being pulled until the bolt carrier is in-battery Compl. ¶29
• Asserted Claims: The complaint asserts independent claim 4 Compl. ¶93
• Accused Features: The "Disruptor" is accused of infringing the '223 Patent Compl. ¶93

Multi-Patent Capsule: U.S. Patent No. 11,724,003

• Patent Identification: U.S. Patent No. 11,724,003, issued August 15, 2023 Compl. ¶14
• Technology Synopsis: The '003 Patent is described as claiming a device that can be selected to operate in two modes: "standard disconnector semiautomatic mode and 'forced reset' semiautomatic mode" Compl. ¶30
• Asserted Claims: The complaint asserts independent claim 4 Compl. ¶107
• Accused Features: The "Disruptor" is accused of infringing the '003 Patent Compl. ¶107

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

• Patent Identification: U.S. Patent No. 12,036,336, issued July 16, 2024 Compl. ¶15
• Technology Synopsis: The '336 Patent is grouped with the '003 patent and is described as claiming a similarly operating device with two modes: standard semi-automatic and "forced reset" semi-automatic Compl. ¶30
• Asserted Claims: The complaint asserts independent claim 3 Compl. ¶121
• Accused Features: The "Disruptor" is accused of infringing the '336 Patent Compl. ¶121

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

• Patent Identification: U.S. Patent No. 12,274,807, issued April 15, 2025 Compl. ¶16
• Technology Synopsis: The '807 Patent is grouped with the '003 and '336 patents and is described as claiming a similarly operating device with two modes: standard semi-automatic and "forced reset" semi-automatic Compl. ¶30
• Asserted Claims: The complaint asserts independent claim 1 Compl. ¶134
• Accused Features: The "Disruptor" is accused of infringing the '807 Patent Compl. ¶134

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

• Patent Identification: U.S. Patent No. 12,636,403, issued May 26, 2026 Compl. ¶17
• Technology Synopsis: The '403 Patent is grouped with the '003, '336, and '807 patents and is described as claiming a similarly operating device with two modes: standard semi-automatic and "forced reset" semi-automatic Compl. ¶30
• Asserted Claims: The complaint asserts independent claim 38 Compl. ¶148
• Accused Features: The "Atrius Selector" and the "Disruptor" are accused of infringing the '403 Patent Compl. ¶148

III. The Accused Instrumentality

Product Identification

• The complaint identifies two accused product lines: the "Atrius Development 3 Position Forced Reset Selector" ("Atrius Selector") and the "(3-Position) Partisan Disruptor" ("Disruptor") Compl. ¶¶32-33 Compl. ¶37

Functionality and Market Context

• Both the Atrius Selector and the Disruptor are alleged to be aftermarket components for AR-15 pattern firearms, sold by Defendant on its website, grabagun.com Compl. ¶¶33-34 Compl. ¶¶37-38
• The complaint alleges both products provide a multi-position selector that allows the user to switch between a standard semi-automatic mode (using a disconnector) and a "forced reset" semi-automatic mode Compl. ¶36 Compl. ¶40
• Product marketing material included in the complaint describes the Atrius Selector as a "three position selector" with "SAFE, SEMI, and FULL-SEMI positions built around forced reset functionality" Compl. ¶35, p. 9 The marketing for the Disruptor describes it as a "drop-in assisted reset AR-15 trigger" with a "Safe/Semi-Automatic/Enhanced Semi-Automatic selector mode configuration" Compl. ¶39, p. 12 The complaint includes a screenshot from Defendant's website showing various models of the Atrius Selector for sale Compl. ¶35, p. 8

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: a hammer... a trigger member... a disconnector... and a cam...	The complaint alleges the Atrius Selector, when installed, is part of a trigger mechanism that functions as a cam to reset and lock the trigger Compl. ¶53 The complaint uses a color-coded diagram to identify the allegedly corresponding parts in the accused assembly (Compl. ¶53, p. 17).	¶53	col. 7:6-8:14
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 the alleged standard mode, the rearward movement of the bolt carrier pivots the hammer (red) so that the disconnector hook (orange) catches the hammer hook (Compl. ¶53, p. 22).	¶53	col. 8:64-9:26
...at which time a user must manually release said trigger member to free said hammer from said disconnector... to fire the firearm...	After the disconnector catches the hammer, the user must manually release the trigger member (brown) to free the hammer (red) from the disconnector (orange) before the firearm can be fired again (Compl. ¶53, p. 23).	¶53	col. 9:18-26
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 alleged "forced reset" mode, the cam is in a second position where rearward pivoting of the hammer (red) occurs, but the disconnector hook (orange) is prevented from catching the hammer hook (Compl. ¶53, p. 24).	¶53	col. 9:27-46
...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 moves forward into battery, the user can pull the trigger member (brown) to fire the firearm without first having to manually release it (Compl. ¶53, p. 25).	¶53	col. 9:51-59

'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: 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 Selector is alleged to be a locking member that is movable between a "Locked First Position" where it restricts trigger movement and an "Unlocked Second Position" where it does not Compl. ¶67, pp. 29-30	¶67	Patent not provided
the locking member having a body portion that is movably supported...	The body portion (purple) of the Atrius Selector is allegedly movably supported by the lower receiver via a detent (blue) (Compl. ¶67, p. 32).	¶67	Patent not provided
...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 Selector is alleged to have an "upwardly extending deflectable portion (lever arm)" (Compl. ¶67, p. 33). The complaint includes an overlay diagram purporting to show that this lever arm can travel separately from the body portion (Compl. ¶67, p. 34).	¶67	Patent not provided

Identified Points of Contention

• Evidentiary Questions: The infringement allegations for all patents rely heavily on plaintiff-generated, color-coded diagrams of the accused products' alleged operation (e.g., Compl. ¶53, p. 17; Compl. ¶67, p. 29). A central point of contention will be whether these diagrams accurately represent the actual mechanical function of the physical Atrius Selector and Disruptor products when installed and operated in a firearm.
• Scope Questions ('247 Patent): The analysis may focus on whether the accused device's "forced reset" mode operates in the specific sequence claimed, particularly the element requiring that the "disconnector hook is prevented from catching said hammer hook." The mechanism by which this is achieved in the accused product will be compared to the patent's teachings.
• Technical Questions '784 Patent: A key technical question will be what constitutes a "separately movable" deflectable portion. The dispute may turn on whether the alleged movement of the accused product's lever arm is the claimed structural, separate movement or merely incidental material flexing.

V. Key Claim Terms for Construction

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

• The Term: "forced reset semi-automatic mode"
• Context and Importance: This term defines the core inventive concept and the primary feature differentiating the invention from standard semi-automatic triggers. The infringement determination will depend on whether the accused products are found to operate in a mode that falls within the construed scope of this term.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent abstract describes this mode as one where "the user can pull the trigger member to fire the firearm without manually releasing the trigger member" '247 Patent, abstract Parties arguing for a broader scope may focus on this functional outcome.
  • Evidence for a Narrower Interpretation: Claim 15 itself provides a specific sequence of events for this mode, including that the "cam lobe forces said trigger member to the set position" and "said safety selector [prevents] said disconnector hook from catching said hammer hook" '247 Patent, claim 15 Parties arguing for a narrower scope may contend that the term is limited to mechanisms that follow this precise mechanical pathway.

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

• The Term: "separately movable"
• Context and Importance: This term qualifies the movement of the "deflectable portion" relative to the "body portion" of the locking member. Practitioners may focus on this term because it appears to be a key point of novelty, and its construction will determine whether the alleged independent motion of the accused product's lever arm meets the claim limitation.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The complaint alleges infringement based on diagrams showing the lever arm moving while the body portion does not (Compl. ¶67, p. 34). A party could argue that any degree of independent motion, such as pivoting or deflecting on a different axis or plane than the main body, satisfies the "separately movable" requirement.
  • Evidence for a Narrower Interpretation: Since the patent document is not provided, this analysis is limited. However, a defendant could argue that the term requires a distinct, uncoupled mechanical relationship (e.g., a separate pivot point or a complete disconnection during movement) that is absent in a component that merely flexes or rocks in place.

VI. Other Allegations

Indirect Infringement

• The complaint alleges both induced and contributory infringement for all asserted patents. The inducement allegations are based on Defendant's alleged marketing, promotion, and instructions on its website that encourage and inform customers how to install and use the accused products in an infringing manner in AR-15 firearms Compl. ¶54 Compl. ¶68 Compl. ¶82 The contributory infringement allegations assert that the accused components are specially designed for infringing use and are not suitable for substantial non-infringing use Compl. ¶56 Compl. ¶70 Compl. ¶84

Willful Infringement

• For each asserted patent, the complaint alleges that Defendant "has known or should have known" its actions constituted infringement and that it continued to infringe despite this knowledge, including after the service of the complaint Compl. ¶57 Compl. ¶71 Compl. ¶85 This forms the basis for a claim of willful infringement.

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

• A core evidentiary issue will be one of functional operation: do the physical "Atrius Selector" and "Disruptor" products actually operate according to the specific mechanical sequences depicted in the Plaintiffs' complaint diagrams? The case may depend on a "battle of the experts" to demonstrate the real-world function of the accused devices.
• The case will also turn on a question of definitional scope: how will the court construe key claim terms such as "forced reset semi-automatic mode" ('247 Patent) and "separately movable" '784 Patent? The breadth or narrowness of these definitions will be critical in determining whether the accused products, as they actually function, fall within the scope of the patent claims.
• A significant procedural question will be one of case management: given the assertion of eight patents with overlapping technical descriptions and infringement allegations against two product lines, a central challenge for the parties and the court will be to streamline the litigation, potentially by focusing on a subset of representative patents and claims to decide the central issues of the dispute.