ABC IP LLC v. Inoculum Group LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas)
  • Defendant: Inoculum-Group LLC (Idaho); Ryan K. Jacobson (Idaho)
  • Plaintiff's Counsel: Beard St. Clair Gaffney PA; Wood Herron & Evans LLP; Fish & Richardson P.C.
• Case Identification: 1:26-cv-00335, D. Idaho, 05/29/2026
• Venue Allegations: Venue is alleged to be proper in the District of Idaho because Defendants reside in the district and/or have committed acts of infringement and maintain a regular and established place of business there.
• Core Dispute: Plaintiffs allege that Defendants' "Disruptor" forced reset trigger assembly infringes five U.S. patents directed to firearm trigger mechanisms that increase the rate of semiautomatic fire.
• Technical Context: The technology relates to aftermarket trigger mechanisms for AR-15-pattern semiautomatic rifles, a market segment where modifications to enhance firing speed are of significant interest to enthusiasts and competitors.
• Key Procedural History: The complaint alleges that the manufacturer of the accused device maintained a webpage titled "FRT Legal Library" that included links to several of the asserted patents, a fact Plaintiffs may use to support allegations of pre-suit knowledge and 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 Issued
2022-01-10	U.S. Patent Nos. 11,724,003, 12,036,336, 12,274,807, and 12,636,403 Priority Date
2023-08-15	U.S. Patent No. 11,724,003 Issued
2024-07-16	U.S. Patent No. 12,036,336 Issued
2025-04-15	U.S. Patent No. 12,274,807 Issued
2026-05-26	U.S. Patent No. 12,636,403 Issued
2026-05-29	Complaint Filed

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

U.S. Patent No. 10,514,223 - Firearm Trigger Mechanism

• Patent Identification: U.S. Patent No. 10,514,223 ("the '223 Patent"), Firearm Trigger Mechanism, issued December 24, 2019. Compl. ¶10

The Invention Explained

• Problem Addressed: In a standard semiautomatic firearm, the rate of fire is limited because a shooter cannot typically release and pull the trigger fast enough to fire a round with every mechanical cycle of the firearm's action Compl. ¶20 A standard disconnector is required to prevent the hammer from simply following the bolt carrier forward without firing, which would leave the firearm uncocked '223 Patent, col. 1:36-47
• The Patented Solution: The patent describes a trigger mechanism that eliminates the need for a traditional disconnector. Instead, the rearward movement of the bolt carrier during the firing cycle makes direct contact with the trigger member, mechanically forcing it back into the "set" position '223 Patent, col. 5:31-37 A separate locking bar prevents the trigger from being pulled again until the bolt carrier has returned to a safe, in-battery position, thereby preventing out-of-battery discharge or "hammer follow" '223 Patent, abstract '223 Patent, col. 5:55-62
• Technical Importance: This design allows for a significantly accelerated rate of semiautomatic fire by mechanically synchronizing the trigger reset with the firearm's action cycle '223 Patent, col. 2:1-3

Key Claims at a Glance

• The complaint asserts at least independent Claim 4 Compl. ¶39
• The essential elements of Claim 4 include:
  • A housing with openings for hammer and trigger pins.
  • A hammer mounted in the housing to pivot between set and released positions.
  • A trigger member with a sear and a surface positioned to be contacted by the hammer during its cycle, causing the trigger member to be "forced to the set position."
  • A pivotally mounted locking bar, spring-biased to a first position where it blocks the trigger member, and movable to a second position by the bolt carrier when it reaches an in-battery position, allowing the trigger to be pulled. '223 Patent, col. 6:50-col. 7:14

U.S. Patent No. 11,724,003 - Firearm Trigger Mechanism

• Patent Identification: U.S. Patent No. 11,724,003 ("the '003 Patent"), Firearm Trigger Mechanism, issued August 15, 2023. Compl. ¶11

The Invention Explained

• Problem Addressed: The patent builds on the concept of forced reset triggers by addressing a desire for more user-selectable functionality. While prior art devices increased the rate of fire, they did not provide an integrated option to revert to a standard, disconnector-based semiautomatic operation. '003 Patent, col. 1:24-28 '003 Patent, col. 2:21-22
• The Patented Solution: The invention is a trigger mechanism featuring a three-position safety selector that allows the user to choose between: (1) a safe position, (2) a standard semiautomatic mode using a disconnector, and (3) a forced reset semiautomatic mode '003 Patent, abstract In the forced reset mode, the selector is configured to prevent the disconnector from engaging the hammer, enabling the forced reset function, while in standard mode, it allows the disconnector to function normally '003 Patent, col. 9:55-10:5
• Technical Importance: This invention provides the user with two distinct firing modes-a conventional semiautomatic feel and an accelerated forced-reset feel-within a single, drop-in trigger assembly, enhancing versatility '003 Patent, col. 2:35-39

Key Claims at a Glance

• The complaint asserts at least independent Claim 4 Compl. ¶47
• The essential elements of Claim 4 include:
  • A trigger mechanism with a housing, hammer, trigger member, disconnector, and locking member.
  • A safety selector movable between "safe, standard semi-automatic, and forced reset semi-automatic positions."
  • A "whereupon" clause describing the standard mode, where the disconnector catches the hammer and the user must manually release the trigger to fire again.
  • A "whereupon" clause describing the forced reset mode, where the cycling action forces the trigger to its set position, the selector prevents the disconnector from catching the hammer, and the user can fire again without manually releasing the trigger. '003 Patent, col. 11:60-col. 12:51

U.S. Patent No. 12,036,336 - Firearm Trigger Mechanism

• Patent Identification: U.S. Patent No. 12,036,336 ("the '336 Patent"), Firearm Trigger Mechanism, issued July 16, 2024. Compl. ¶12
• Technology Synopsis: As a continuation of the application leading to the '003 Patent, the '336 Patent describes and claims a similar trigger mechanism. It features a safety selector that enables switching between a standard, disconnector-based semiautomatic mode and a forced reset mode where the action of the firearm resets the trigger. '336 Patent, abstract
• Asserted Claims: At least Claim 3 Compl. ¶54
• Accused Features: The complaint alleges the "Disruptor" trigger's three selectable modes of "Safe, Semi-Automatic, and Enhanced Semi-Automatic" infringe Compl. ¶28 Compl. ¶54

U.S. Patent No. 12,274,807 - Firearm Trigger Mechanism

• Patent Identification: U.S. Patent No. 12,274,807 ("the '807 Patent"), Firearm Trigger Mechanism, issued April 15, 2025. Compl. ¶13
• Technology Synopsis: Also a continuation in the same family, the '807 Patent claims a trigger assembly with selectable standard and forced reset modes. The claims focus on the combination of a hammer, trigger member, disconnector, locking member, and a multi-position safety selector to achieve the dual-mode functionality. '807 Patent, abstract
• Asserted Claims: At least Claim 1 Compl. ¶61
• Accused Features: The infringement allegation targets the "Disruptor" trigger's ability to operate in both a standard semiautomatic mode and a forced reset ("Enhanced Semi-Automatic") mode via its three-position selector Compl. ¶28 Compl. ¶61

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

• Patent Identification: U.S. Patent No. 12,636,403 ("the '403 Patent"), Firearm Trigger Mechanism, issued May 26, 2026. Compl. ¶14
• Technology Synopsis: This patent, also in the same family, claims a forced reset trigger mechanism with a safety selector for switching between standard and forced reset modes. The claims detail the interaction of the hammer, disconnector, and trigger member in each mode. '403 Patent, abstract
• Asserted Claims: At least Claim 38 Compl. ¶68
• Accused Features: The "Disruptor" trigger's selectable modes are accused of infringement, particularly the functionality of the "standard semi-automatic" and "forced reset semi-automatic" positions Compl. ¶30 Compl. ¶32 Compl. ¶68

III. The Accused Instrumentality

Product Identification

• The "Disruptor" forced reset trigger assembly, also referred to as "The Partisan Disruptor Forced Reset Trigger" Compl. ¶26 Compl. ¶27

Functionality and Market Context

• The Disruptor is a "drop-in cassette" trigger mechanism for AR-15 type rifles Compl. ¶27 It is advertised as having a three-position safety selector for "Safe, Standard Semi Auto, [and] Enhanced Semi Auto" modes Compl. ¶27 Compl. ¶28 The complaint alleges that in the "Enhanced" (forced reset) mode, the cycling of the firearm's action causes contact between the hammer and trigger member to "forcefully reset" the trigger Compl. ¶29 It further alleges a "locking bar/member" prevents the trigger from being pulled until the bolt carrier is in a safe, in-battery position Compl. ¶29 The complaint includes a screenshot from the Inoculum website marketing the accused product. Compl. ¶27

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 accused device includes a housing with transversely aligned openings for hammer and trigger assembly pins. An annotated image in the complaint identifies these openings.	¶41	col. 4:35-42
a hammer having a sear notch and mounted in the housing to pivot on a transverse axis between set and released positions;	The accused device includes a hammer with a sear notch and is mounted in the housing.	¶41	col. 4:25-29
a trigger member having a sear and mounted in the housing to pivot on a transverse axis between set and released positions, 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 accused device's trigger member has a surface that is contacted by the hammer when the hammer is displaced by the bolt carrier. The complaint alleges this contact forces the trigger member to the set position. An annotated image highlights the "Hammer surface" and "Trigger surface."	¶41	col. 5:31-37
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, 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 accused device includes a pivotally mounted locking bar that is spring-biased to a position where it blocks the trigger member. It is movable to a second position when contacted by the in-battery bolt carrier, allowing the trigger to be pulled.	¶41	col. 5:37-44; col. 5:55-62

'003 Patent Infringement Allegations

Claim Element (from Independent Claim 4)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a housing having a first pair of transversely aligned openings for receiving a hammer pin and a second pair of transversely aligned openings for receiving a trigger member pin,	The accused device includes a housing with two pairs of transversely aligned openings for the hammer and trigger pins.	¶48	col. 7:51-61
a hammer having a sear catch and a hook for engaging a disconnector and mounted in said housing to pivot...	The accused device includes a hammer with a sear catch and a hook for engaging a disconnector.	¶48	col. 8:1-4
a disconnector having a hook for engaging said hammer and mounted in said housing to pivot on said trigger member pin,	The accused device includes a disconnector with a hook for engaging the hammer, which is mounted to pivot on the trigger member pin.	¶48	col. 8:23-28
a locking member mounted in said housing to pivot on a transverse locking member pin, said locking member being pivotable between a first position...and a second position...	The accused device includes a locking member that pivots between a first position blocking the trigger and a second position allowing the trigger to be moved.	¶48	col. 8:29-50
a safety selector adapted to be mounted in a fire control mechanism pocket of a receiver to pivot between safe, standard semi-automatic, and forced reset semi-automatic positions,	The accused device includes a safety selector that pivots between safe, standard semi-automatic, and forced reset semi-automatic positions.	¶48	col. 9:11-23
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...	When in the standard semi-automatic mode, the disconnector hook catches the hammer hook, and the user must manually release the trigger to fire again.	¶48	col. 9:36-54
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, said safety selector preventing said disconnector hook from catching said hammer hook, 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 in the forced reset semi-automatic mode, the action forces the trigger to the set position, the safety selector prevents the disconnector from catching the hammer, and the user can fire again without manually releasing the trigger. A plaintiff-generated rendering in the complaint depicts this functionality.	¶48; ¶70	col. 9:55-10:25

• Identified Points of Contention:
  • Functional Equivalence: A central question for all asserted patents will be whether the accused "Disruptor" trigger's "Enhanced Semi-Automatic" mode operates in a manner that is functionally and structurally equivalent to the mechanisms described in the patents. For the '223 Patent, the court may need to determine if the interaction between the hammer and trigger constitutes being "forced to the set position" as claimed. For the '003 Patent and its family, a key question is whether the accused device's safety selector "prevents" the disconnector from engaging the hammer in the manner required by the claims.
  • Claim Scope: For the '223 Patent, which claims a trigger mechanism without a selectable mode, a question arises as to whether the presence of an additional "standard disconnector mode" in the accused device Compl. ¶28 allows it to avoid infringement of claims that do not recite that feature. The complaint asserts that the presence of an additional mode does not affect the infringement analysis Compl. ¶29

V. Key Claim Terms for Construction

• The Term: "forced to the set position" '223 Patent, Claim 4
• Context and Importance: This term is the central inventive concept of the '223 Patent, defining how the trigger is reset. The outcome of the infringement analysis may depend on whether this term requires a specific type or degree of mechanical action, or if any contact from the hammer that results in a reset is sufficient.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification uses the general phrase "mechanical interference or contact" to describe the interaction, which may support an interpretation covering a wide range of contacts that cause a reset '223 Patent, col. 5:32-33
  • Evidence for a Narrower Interpretation: The word "forces" itself implies a non-incidental, deterministic action. Embodiments show a direct pushing contact between the hammer's rear surface and the trigger member's contact surface, which may support an argument that the term requires a specific, direct application of force rather than a glancing or incidental contact '223 Patent, Fig. 5
• The Term: "said safety selector preventing said disconnector hook from catching said hammer hook" '003 Patent, Claim 4
• Context and Importance: This limitation is critical to defining the "forced reset" mode in the '003 patent family, distinguishing it from the "standard" mode. Practitioners may focus on whether this functional language requires the specific mechanism disclosed in the patent, where a protuberance on the selector physically blocks or repositions the disconnector.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The claim language is purely functional ("preventing"). An argument could be made that any configuration where the selector's position results in the disconnector being unable to catch the hammer meets this limitation, regardless of the precise mechanism.
  • Evidence for a Narrower Interpretation: The specification describes a specific structure for this function: "The safety selector can have a protuberance thereon which, when the safety selector is in the forced reset semi-automatic position, contacts the disconnector preventing the disconnector hook from catching the hammer hook" '003 Patent, col. 4:10-14 Parties may argue this disclosure limits the claim's scope to a direct interaction caused by the selector itself.

VI. Other Allegations

• Indirect Infringement: The complaint alleges inducement and contributory infringement, particularly for the '403 Patent (Compl. ¶68; Compl. ¶69). The basis for the contributory infringement claim is that the accused trigger assemblies are "specially designed and adapted" for infringement and are "not suitable for substantial noninfringing use" Compl. ¶71
• Willful Infringement: Willfulness is alleged for all five asserted patents Compl. ¶36 The primary factual basis alleged is Defendants' purported pre-suit knowledge of the patents. The complaint claims the manufacturer of the accused device, Peak Tactical, LLC d/b/a Partisan Triggers, hosted a "FRT Legal Library" on its website that linked to copies of the '223, '003, and '336 patents, thereby providing notice of Plaintiffs' rights Compl. ¶33

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

• A core issue will be one of claim construction and functional equivalence: Can the functional language in the claims, such as the trigger being "forced to the set position" ('223 Patent) and the safety selector "preventing" the disconnector from engaging ('003 Patent), be met by the specific mechanical operation of the accused "Disruptor" trigger? The case may turn on whether the accused device achieves a similar result through a sufficiently different mechanism.
• A second key question will be one of knowledge and intent: What legal weight will be given to the allegation that the accused device's manufacturer hosted a "Legal Library" with links to the asserted patents? This fact will be central to Plaintiffs' attempt to prove the subjective prong of willfulness and the knowledge requirement for indirect infringement.