ABC IP LLC v. Mist Distributors LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas); RBTM LLC (Wyoming)
  • Defendant: Mist Distributors, LLC (Ohio); Arthur R. Thomson (Ohio)
  • Plaintiff's Counsel: Wood Herron & Evans LLP
• Case Identification: 1:26-cv-00658, S.D. Ohio, 07/07/2026
• Venue Allegations: Venue is asserted based on Defendants residing in the district and having a regular and established place of business there.
• Core Dispute: Plaintiffs allege that Defendants' "FRB" line of firearm triggers infringes four patents related to "forced reset" trigger mechanisms.
• Technical Context: The technology concerns aftermarket trigger mechanisms for semiautomatic firearms that use the energy from the cycling bolt carrier to mechanically reset the trigger, enabling a faster rate of fire than standard trigger designs.
• Key Procedural History: The complaint does not mention any prior litigation, Inter Partes Review (IPR) proceedings, or licensing history related to the patents-in-suit.

Case Timeline

Date	Event
2020-01-01	Plaintiffs' use of FRT trademark allegedly begins
2021-11-05	Priority Date for '784 Patent
2022-01-10	Priority Date for '403 Patent
2022-09-08	Priority Date for '247 and '159 Patents
2024-07-09	Issue Date for '784 Patent
2024-07-16	Issue Date for '247 Patent
2026-03-17	Issue Date for '159 Patent
2026-05-26	Issue Date for '403 Patent
2026-07-07	Complaint Filing Date

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. ¶11

The Invention Explained

• Problem Addressed: The patent's background section notes a desire among some shooters to increase the rate of semiautomatic fire beyond what is typically possible with a standard trigger, which requires a user to manually release and reset the trigger between shots Compl. ¶21 '247 Patent, col. 1:40-42 Existing methods like "bump firing" are described, and the patent states that "Further improvement in forced reset triggers is desired" '247 Patent, col. 1:14-15
• The Patented Solution: The patent discloses a trigger mechanism, often as a "drop-in" module, with a selector for multiple modes, including a "forced reset semi-automatic" mode '247 Patent, col. 2:23-27 In this 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, abstract This mechanical reset allows the user to fire another round as soon as the bolt is back in battery, without needing to manually release the trigger, thereby increasing the potential rate of fire '247 Patent, col. 4:1-11
• Technical Importance: The invention provides a selectable, mechanical solution to increase the firing rate of common semi-automatic firearm platforms, intended to be retrofitted as a self-contained module '247 Patent, col. 2:17-27

Key Claims at a Glance

• The complaint asserts independent claim 15 '247 Patent, claim 15 Compl. ¶40
• The essential elements of independent claim 15 include:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam.
  • The mechanism is operable in a "standard semi-automatic mode" where the disconnector catches the hammer after firing, requiring a manual trigger release to reset.
  • The mechanism is also operable in a "forced reset semi-automatic mode" where the cam is in a second position.
  • In this forced reset mode, rearward movement of the bolt carrier causes the disconnector hook to be prevented from catching the hammer hook.
  • Thereafter, the user can pull the trigger to fire again without a manual release.
• The complaint reserves the right to assert other claims, including dependent claims Compl. ¶38

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. ¶12

The Invention Explained

• Problem Addressed: The patent explains that forced reset triggers designed for one firearm platform (e.g., AR-15) may not work in another (e.g., AR-10) due to different bolt carrier geometries. Specifically, a locking bar extended to reach the higher tail of an AR-10 bolt carrier would then interfere with the lower-sitting forward portion of that same carrier as it cycles rearward, rendering the device inoperable '784 Patent, col. 1:21-44
• The Patented Solution: The invention is an extended trigger member locking device featuring an "upwardly extending deflectable portion that is separately movable relative to the body portion" '784 Patent, abstract '784 Patent, col. 2:4-11 This extension is long enough to be actuated by the bolt carrier returning to battery, but it is designed to fold or deflect out of the way when the forward part of the bolt carrier passes over it, thus avoiding interference '784 Patent, col. 4:26-37 The patent illustrates this with a hinged structure '784 Patent, figs. 8-10
• Technical Importance: This design adapts the forced reset trigger concept to work across multiple firearm platforms with varying bolt carrier dimensions, overcoming a key geometric limitation of prior designs '784 Patent, col. 1:45-49

Key Claims at a Glance

• The complaint asserts independent claim 1 '784 Patent, claim 1 Compl. ¶54
• 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) and second (unlocked) position.
  • The locking member includes an upward extension to make "actuating contact with a surface of a bolt carrier."
  • The locking member comprises 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 Compl. ¶52

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. ¶13

Technology Synopsis

The '159 Patent describes a firearm trigger mechanism operable in both a "standard semi-automatic mode" and a "forced reset semi-automatic mode" '159 Patent, claim 1 The invention uses the cycling of the bolt to mechanically force the trigger member back to its set position, enabling an increased rate of fire without the user needing to manually release the trigger '159 Patent, abstract The claims appear to address the core dual-mode functionality of a forced reset system.

Asserted Claims

The complaint asserts independent claim 1 Compl. ¶66 Compl. ¶68

Accused Features

Plaintiffs allege that the entire accused "FRB device" infringes by embodying a trigger mechanism that operates in both a standard and a forced reset semi-automatic mode, mapping directly to the functionality described in the asserted claim Compl. ¶66 Compl. ¶68

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

• Patent Identification: U.S. Patent No. 12,636,403, "Firearm Trigger Mechanism," issued May 26, 2026 (the "'403 Patent") Compl. ¶14

Technology Synopsis

The '403 Patent discloses a trigger mechanism with selectable modes of operation controlled by a three-position safety selector: safe, standard semi-automatic, and forced reset semi-automatic '403 Patent, abstract In the standard mode, a disconnector catches the hammer, requiring a manual trigger release. In the forced reset mode, the safety selector prevents the disconnector from catching the hammer, and the cycling of the bolt forces the trigger to reset, allowing for immediate subsequent firing '403 Patent, abstract

Asserted Claims

The complaint asserts independent claims 38 and 54 Compl. ¶80 Compl. ¶82 Compl. ¶83

Accused Features

The complaint alleges the accused "FRB device" infringes by incorporating a safety selector that allows the user to switch between a standard "disconnector mode" and a "forced reset" mode, which is alleged to correspond to the claimed invention Compl. ¶30 Compl. ¶82 Compl. ¶83

III. The Accused Instrumentality

Product Identification

• The accused products are a line of aftermarket firearm triggers referred to generally as the "FRB device" Compl. ¶27 Specific product names mentioned include "FRB DRIPP STICK- GOLD Series," "FRB: Drip Drop-Goldie Series 2-Pack," and "FRB Drop-In Enhanced Reset Trigger Assembly" Compl. ¶29

Functionality and Market Context

• The complaint alleges the FRB is an "Enhanced Reset Device" or "reset-assist module" sold for use in AR-15 platform firearms Compl. ¶29 Its function is allegedly to provide for operation in at least two modes: a "disconnector mode" that functions like a standard semi-automatic trigger, and a "forced reset" mode Compl. ¶30 The complaint alleges that the user can switch between these modes by rotating the safety selector Compl. ¶30 The products are allegedly sold through the website "mistdistributors.com" Compl. ¶28 The complaint provides a photograph of the accused "FRB DRIPP STICK" device, described as a "precision-built, carbon-fiber-infused unit" Compl. ¶29, p. 7

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 having a sear catch and a hook for engaging a disconnector...	The FRB is installed with a hammer (red) that has a sear catch and a hook for engaging a disconnector (orange). A plaintiff-generated rendering depicts these components.	¶40	col. 7:45-47
a trigger member having a sear and adapted to be mounted in the fire control mechanism pocket...	The FRB is installed with a trigger member (brown) that has a sear and pivots in the fire control mechanism pocket.	¶40	col. 7:50-54
said disconnector having a hook for engaging said hammer...	The disconnector (orange) has a hook for engaging the hammer (red).	¶40	col. 8:1-3
and a cam having a cam lobe and adapted to be movably mounted in the fire control mechanism pocket...	The FRB has a cam (green) with a cam lobe that is movably mounted in the fire control mechanism pocket.	¶40	col. 8:5-9
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 cam is alleged to be movable between two positions, where in the second position the cam lobe moves the trigger member toward the set position via a link.	¶40	col. 9:15-20
whereupon in a standard semi-automatic mode... rearward movement of the bolt carrier causes rearward pivoting of said hammer such that said disconnector hook catches said hammer hook...	In standard mode, rearward bolt carrier movement causes the hammer to pivot and the disconnector hook to catch the hammer hook.	¶40	col. 9:2-12
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...	In standard mode, the user must manually release the trigger member to free the hammer from the disconnector to allow the mechanism to reset.	¶40	col. 9:21-27
and 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, and rearward bolt movement causes pivoting of the hammer while the disconnector hook is prevented from catching it.	¶40	col. 9:28-44

• Identified Points of Contention:
  • Scope Questions: Claim 15 recites distinct "standard" and "forced reset" modes with specific functional steps. A potential dispute may arise over whether the accused FRB device's modes of operation map precisely onto these claimed definitions, or if there are operational differences that place the product outside the claim's scope.
  • Technical Questions: A key technical question will be how, in the "forced reset" mode, the accused device achieves the claimed function that the "disconnector hook is prevented from catching said hammer hook." The complaint's evidence consists of plaintiff-generated renderings Compl. ¶40, p. 15, and the court will need to evaluate whether the actual physical operation of the accused product confirms this specific interaction as required by the claim.

'784 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
In a forced rest trigger mechanism, an extended trigger member locking device, comprising:	The FRB is alleged to be part of a reset trigger mechanism and to function as an extended trigger member locking device. The complaint includes a photograph of the assembled accused device.	¶54	col. 2:50-52
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 accused FRB is alleged to operate as a locking member movable between a first locked position and a second unlocked position.	¶54	col. 2:53-58
the locking member is configured to be movably supported by a frame...	The FRB is alleged to be movably supported by a frame (purple).	¶54	col. 2:58-60
and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier,	The FRB is alleged to have an upward extending portion (the "lever arm," yellow) that makes actuating contact with the bolt carrier.	¶54	col. 2:60-63
the locking member having a body portion that is movably supported...	The FRB is alleged to have a body portion (blue) that is movably supported by a housing (purple). A plaintiff-generated rendering shows this component.	¶54	col. 2:64-65
and an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position.	The FRB is alleged to have an upwardly extending deflectable portion ("lever arm") that is separately movable from its body portion.	¶54	col. 2:65-3:2

• Identified Points of Contention:
  • Scope Questions: The central dispute may focus on the term "separately movable." The question for the court will be whether this term requires two or more distinct components assembled together (as shown in the patent's embodiments, e.g., '784 Patent, fig. 2), or if it can be construed to cover a single, monolithic component designed to flex in one area relative to another.
  • Technical Questions: The infringement allegation relies heavily on computer renderings that depict the "lever arm" of the FRB device deflecting independently of the main body Compl. ¶54, p. 32 A technical question will be whether the physical accused product actually contains this structure and operates in this manner, or if it is a single rigid piece that does not have a "separately movable" portion as claimed.

V. Key Claim Terms for Construction

• The Term: "forced reset semi-automatic mode" '247 Patent, claim 15

• Context and Importance: This phrase defines a complete mode of operation that is central to the invention of the '247 Patent. Infringement requires the accused device to operate in a way that satisfies all the functional limitations associated with this mode, making its precise construction critical.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The patent summary describes the invention as providing a mechanism for "increasing rate of fire that can be retrofitted" and where the hammer "forces the trigger to the set position" '247 Patent, col. 2:17-21 '247 Patent, col. 2:2-3 This general functional language may support a broader reading covering various mechanical reset implementations.
  • Evidence for a Narrower Interpretation: The claim language for this mode is highly specific, requiring that "said safety selector [is] preventing said disconnector hook from catching said hammer hook" '247 Patent, claim 15 The abstract also recites this specific interaction '247 Patent, abstract This language suggests the mode is not just any forced reset, but one where the safety selector actively disables the disconnector's ability to catch the hammer.

• The Term: "separately movable relative to the body portion" '784 Patent, claim 1

• Context and Importance: This term describes the core structural novelty of the '784 Patent, which allows the trigger mechanism to be adapted for firearms with different bolt carrier geometries. Whether the accused device infringes may turn entirely on how this structural limitation is construed.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification uses flexible language, stating the invention provides a "deflectable extension" and that the member can "deflect or fold" '784 Patent, col. 1:50 '784 Patent, col. 2:9 This may support an interpretation that covers a single piece designed to flex, not just a hinged assembly.
  • Evidence for a Narrower Interpretation: The detailed embodiments explicitly show a multi-part construction, with an "extension portion 22" that pivots on a "transverse pivot pin 24 relative to the locking bar body 26" '784 Patent, col. 3:41-44 The abstract also distinguishes between the "body portion that is movably supported" and the "upward extension portion that is separately movable," which may suggest they are distinct structural elements.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both induced and contributory infringement for all four patents. Inducement is alleged based on Defendants' "advertising, promoting, and instructing others to use" the FRB device Compl. ¶41 Compl. ¶55 Compl. ¶69 Compl. ¶84 Contributory infringement is alleged based on the sale of components, such as the "cam or cam lever arm," that are "specially designed" for infringement and have no substantial non-infringing use Compl. ¶43 Compl. ¶57 Compl. ¶71 Compl. ¶86
• Willful Infringement: Willfulness is alleged for all four patents. The complaint asserts that Defendants "have known or should have known" their actions constituted infringement and could not have held a reasonable belief of non-infringement or invalidity, citing knowledge obtained "at least through the service of this complaint" Compl. ¶44 Compl. ¶58 Compl. ¶72 Compl. ¶87

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

• A core issue will be one of definitional scope: can the term "separately movable" from the '784 Patent, which is exemplified in the specification with a multi-part hinged assembly, be construed to read on the accused product's alleged single-piece, flexible lever design?
• A key evidentiary question will be one of functional accuracy: will discovery show that the accused FRB device's physical operation matches the specific sequence of events recited in the claims-particularly the '247 Patent's requirement that the safety selector prevents the disconnector from catching the hammer in the forced-reset mode-or do the plaintiff's computer-generated renderings in the complaint oversimplify or mischaracterize the actual mechanism?
• A central technical question will be one of operational mapping: does the accused product's dual-mode functionality, switchable via a safety selector, align with the detailed functional and structural limitations laid out across the multiple asserted patents, or are there sufficient technical distinctions in its operation to place it outside the scope of the overlapping claims?