ABC IP LLC v. Pembleton Sons' LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiffs: ABC IP, LLC (Delaware); Rare Breed Triggers, Inc. (Texas); RBTM LLC (Wyoming)
  • Defendant: Pembleton and Sons' LLC (Texas)
  • Plaintiff's Counsel: Whitaker Chalk Swindle & Schwartz PLLC; Wood Herron & Evans LLP; Fish & Richardson P.C.
• Case Identification: 4:26-cv-4216, S.D. Tex., 05/27/2026
• Venue Allegations: Venue is alleged to be proper in the Southern District of Texas because the Defendant resides in the district and has a regular and established place of business there.
• Core Dispute: Plaintiffs allege that Defendant's "Super Safety" trigger modification kits infringe five patents related to "forced reset trigger" mechanisms for semi-automatic firearms.
• Technical Context: The technology at issue involves mechanical trigger systems designed to increase the potential rate of fire of semi-automatic firearms by using the energy from the cycling action to reset the trigger, rather than relying on the user to do so manually.
• Key Procedural History: The complaint alleges Plaintiffs have used the "FRT" trademark since at least 2020 to identify their unique trigger systems.

Case Timeline

Date	Event
2020-01-01	(On or before) Plaintiffs' use of "FRT" mark begins
2021-11-05	Priority Date for '784 Patent
2022-01-10	Priority Date for '403 Patent
2022-01-31	Trademark Application Date (FRT-15)
2022-02-01	Trademark Application Date (FRT, FRT-22, FRT-47)
2022-09-08	Priority Date for '247 Patent and '159 Patent
2023-12-04	Priority Date for '538 Patent
2024-07-09	Issue Date for '784 Patent
2024-07-16	Issue Date for '247 Patent
2024-08-24	Trademark Application Date (FRT-15L3)
2026-01-20	Issue Date for '538 Patent
2026-03-17	Issue Date for '159 Patent
2026-03-20	Trademark Application Date (FRT-MR3, FRT-RD3)
2026-05-26	Issue Date for '403 Patent
2026-05-27	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: In a standard semi-automatic firearm, the rate of fire is limited by the user's ability to manually release and reset the trigger after each shot Compl. ¶21 The disconnector in a standard trigger prevents the hammer from following the bolt carrier, ensuring only one shot per trigger pull, but requires this manual reset action '247 Patent, col. 1:36-45
• The Patented Solution: The patent discloses a trigger mechanism with a selectable "forced reset" mode. In this mode, a pivoting cam is actuated by the rearward movement of the firearm's bolt carrier '247 Patent, col. 2:57-61 This cam then forces the trigger member back to its "set" position, making it ready to be pulled again without the user needing to manually release it, thereby enabling a more rapid firing sequence Compl. ¶23 '247 Patent, abstract The mechanism uses a three-position safety selector to switch between safe, standard semi-automatic, and forced reset modes '247 Patent, col. 2:28-33
• Technical Importance: The invention provides a self-contained, selectable mechanical system to accelerate the firing sequence of a semi-automatic firearm, distinct from imprecise techniques like "bump firing" Compl. ¶23 '247 Patent, col. 1:46-55

Key Claims at a Glance

• The complaint asserts independent claim 15 Compl. ¶40
• Claim 15 breaks down into the following essential elements:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam with a cam lobe.
  • The cam is movable 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 operates in a "standard semi-automatic mode" where the user must manually release the trigger to reset it.
  • The mechanism also operates in a "forced reset semi-automatic mode" where rearward movement of the bolt carrier causes the cam to force the trigger reset, and the disconnector hook is "prevented from catching said hammer hook."
• The complaint reserves the right to assert other claims Compl. ¶40

U.S. Patent No. 12,031,784 - "Adapted Forced Reset Trigger", issued July 9, 2024

The Invention Explained

• Problem Addressed: A forced reset trigger designed for one firearm pattern (e.g., AR-15) may not be operable in another (e.g., AR-10) due to different geometries. Specifically, a taller locking member needed to engage the higher bolt carrier of an AR-10 would interfere with a lower-sitting forward portion of that same bolt carrier as it cycles rearward, rendering the mechanism inoperable '784 Patent, col. 1:21-42
• The Patented Solution: The patent describes a trigger locking device with a "deflectable extension" '784 Patent, abstract This locking member is composed of a main body and an "upwardly extending deflectable portion that is separately movable relative to the body portion" '784 Patent, col. 5:11-col. 6:10 This two-part construction allows the extension to be actuated by the bolt carrier to unlock the trigger, but also to fold or deflect out of the way to avoid interfering with other parts of the bolt carrier during its rearward travel '784 Patent, col. 2:5-10 '784 Patent, Fig. 7
• Technical Importance: The invention adapts the forced reset trigger concept for use in weapon platforms with different and potentially conflicting internal geometries, expanding its applicability beyond the original AR-15 design Compl. ¶24

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶54
• Claim 1 breaks down into the following essential elements:
  • In a forced reset trigger mechanism, an extended trigger member locking device comprising a locking member movable between a locked first position and an unlocked second position.
  • The locking member is actuated by contact with a bolt carrier.
  • The locking member has a movably supported "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. ¶54

U.S. Patent No. 12,529,538 - "Safety Mechanism for Firearm"

• Issued: January 20, 2026 Compl. ¶12
• Technology Synopsis: The patent discloses a safety mechanism for a firearm employing a "cam selector" with multiple recesses. This selector interacts with the trigger to enable three distinct operational modes: a first (standard semi-automatic) mode, a second mode where the cam rotates to actuate the trigger for a forced reset, and a third (safe) mode that prevents the trigger from being pulled Compl. ¶25
• Asserted Claims: Independent claim 1 Compl. ¶68
• Accused Features: The "Super Safety" is alleged to embody the claimed invention by functioning as a three-position safety that includes standard, forced reset, and safe modes controlled by a cam selector Compl. ¶¶29, 32, 70

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

• Issued: March 17, 2026 Compl. ¶13
• Technology Synopsis: The patent describes a firearm trigger mechanism operable in two modes: "standard semi-automatic" and "forced reset semi-automatic." The invention uses a cam, rotated by the cycling of the firearm's action, to move the trigger member to reset and to prevent the trigger from being pulled until the action is back in battery Compl. ¶23
• Asserted Claims: Independent claim 1 Compl. ¶82
• Accused Features: The "Super Safety" is alleged to infringe by providing both a standard and a forced reset semi-automatic mode of operation, thereby creating the invention claimed in the '159 Patent when its components are installed Compl. ¶¶29, 30a, 84

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

• Issued: May 26, 2026 Compl. ¶14
• Technology Synopsis: This patent describes a firearm trigger device that can be selected to operate in two distinct modes: a "standard disconnector semiautomatic mode" and a "forced reset semiautomatic mode" Compl. ¶26
• Asserted Claims: Independent claim 38 Compl. ¶96
• Accused Features: The "Super Safety" is alleged to infringe by incorporating a selector that allows the user to switch between a standard and a forced reset semi-automatic mode, which Plaintiffs allege embodies the technology of the '403 Patent Compl. ¶¶29, 32, 98

III. The Accused Instrumentality

Product Identification

• The primary accused instrumentality is the "(3-Position) 'Super Safety'" Compl. ¶29

Functionality and Market Context

• The "Super Safety" is sold as a modification for AR-pattern firearms and is available in multiple forms, including as a "partial kit," a "complete kit," or pre-installed in a receiver or complete firearm Compl. ¶30
• The product is alleged to function as a selector that allows the user to switch between three modes: safe, standard semi-automatic (disconnector mode), and forced reset semi-automatic Compl. ¶32
• In the forced reset mode, the mechanism allegedly uses a cam, actuated by the firearm's cycle, to force the trigger to its reset position, enabling a faster rate of fire Compl. ¶23 Compl. ¶32 The complaint includes a photograph of the "2 POS SUPER SAFETY" kit, showing the various components intended for installation Compl. p. 8 Another visual shows a "candiru bolt carrier adapter," suggesting it is a component used with the system Compl. p. 9

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... said disconnector... and a cam having a cam lobe	When installed, the Super Safety functions as a forced reset trigger mechanism that includes a hammer, trigger, disconnector, and a cam with a lobe that forces the trigger to reset and locks it during operation.	¶42	col. 7:45-col. 8:13
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 Super Safety cam is alleged to be movable between two positions. In the second position (forced reset mode), the cam lobe forces the trigger member toward its set position.	¶42 (p. 17-18)	col. 9:29-37
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... a user must manually release said trigger member... to fire the firearm	The complaint alleges that in standard mode, the Super Safety's cam is in a first position, and rearward bolt carrier movement causes the disconnector to catch the hammer. A user must then manually release the trigger to reset and fire again.	¶42 (p. 19-20)	col. 9:1-24
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... at which time the user can pull said trigger member to fire the firearm	In forced reset mode, the cam is in a second position, which forces the trigger to reset and prevents the disconnector from catching the hammer. The user can then pull the trigger again to fire without a manual release.	¶42 (p. 21-22)	col. 9:29-50

'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: 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 Super Safety is alleged to be part of a forced reset trigger mechanism and to function as an extended trigger member locking device, with a locked first position and an unlocked second position.	¶56 (p. 25, 27)	col. 2:5-14
the locking member configured to be movably supported by a frame and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier	The Super Safety is allegedly supported by the firearm's frame (lower receiver) and has an upward extending lever arm that makes contact with the bolt carrier. A plaintiff-generated rendering shows this interaction. Compl. p. 28	¶56 (p. 27-28)	col. 2:15-18
the locking member having a body portion that is movably supported and an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position.	The complaint alleges the Super Safety functions as an extended trigger member locking device, which corresponds to the claimed locking member. The complaint does not explicitly detail a "separately movable" portion in prose, but the infringement theory appears to rely on the functionality of the overall accused system.	¶56 (p. 25)	col. 2:19-24

Identified Points of Contention

• Scope Questions: A central question for the '784 patent will be whether the accused "Super Safety" device, potentially in combination with its "candiru bolt carrier adapter" Compl. p. 9, contains a "deflectable portion that is separately movable," or if it achieves a similar result through a different, non-infringing structure. For the '247 patent and its relatives, a question may be whether the accused product, sold as a kit, constitutes a "firearm trigger mechanism" as claimed, particularly in light of allegations of contributory infringement where the end-user completes the assembly Compl. ¶45
• Technical Questions: A key technical question for the '247, '159, and '403 patents will be whether the accused device's cam, safety selector, and disconnector interact in the precise manner required by the claims to distinguish between "standard" and "forced reset" modes. Specifically, does the safety selector in one mode physically prevent the disconnector from catching the hammer hook, as claimed in the '247 patent?

V. Key Claim Terms for Construction

'247 Patent

• The Term: "forces said trigger member towards said set position" (Claim 15)
• Context and Importance: This phrase is the functional core of the "forced reset" mode. The definition of "forces" will be critical to determining infringement. Practitioners may focus on this term because the dispute will likely involve whether the cam's interaction with the trigger is a direct, positive mechanical action as suggested by the patent's embodiments, or if the accused device achieves the reset through a different interaction that may fall outside a narrow construction of the term.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The summary of the invention states the cam lobe "forces the trigger member towards the set position," without limiting the exact mechanism of that force '247 Patent, col. 2:50-57
  • Evidence for a Narrower Interpretation: The detailed description and figures consistently show a cam lobe (78) physically acting upon a cam follower (58) on the trigger member to pivot it counter-clockwise, suggesting a direct, unyielding mechanical impulsion '247 Patent, col. 9:10-12 '247 Patent, Fig. 8A

'784 Patent

• The Term: "an upwardly extending deflectable portion that is separately movable relative to the body portion" (Claim 1)
• Context and Importance: This term describes the central innovation for adapting the trigger to different firearm platforms. The case may hinge on whether the accused product's mechanism for avoiding bolt interference qualifies as a "separately movable" part.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The claim language does not specify the mechanism of movement, only that the "deflectable portion" is "separately movable." This could be argued to cover any two-part design where the upper extension moves independently of the main body to allow the bolt to pass.
  • Evidence for a Narrower Interpretation: The specification describes and illustrates the "deflectable portion" as a "foldable extension" (22) that pivots on a transverse pin (24) relative to the locking bar body (26) '784 Patent, col. 3:40-45 '784 Patent, Fig. 2 A defendant may argue this disclosure limits the claim scope to hinged or pivoted structures.

VI. Other Allegations

• Indirect Infringement: The complaint alleges both induced and contributory infringement. Inducement is alleged based on Defendant's "installation of, encouraging, advertising, promoting, and instructing others to use" the Super Safety Compl. ¶43 Compl. ¶57 Contributory infringement is alleged on the basis that the sold components, such as the cam or lever arm, are "not suitable for substantial noninfringing use" and are "specially designed" to be used in an infringing manner Compl. ¶45 Compl. ¶59
• Willful Infringement: Willfulness is alleged for all asserted patents. The complaint claims Defendant engaged in "egregious infringement behavior with knowledge of the" patents and "could not reasonably or subjectively believe that its actions do not constitute infringement" Compl. ¶46 Compl. ¶60 Compl. ¶74 Compl. ¶88 Compl. ¶102

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

• A core issue will be one of structural and functional equivalence: For the '784 patent, can the claim term "separately movable... deflectable portion," which the patent illustrates as a hinge, be construed to cover the specific mechanism used by the accused "Super Safety" and its adapter to avoid bolt carrier interference? For the other patents, a key evidentiary question will be whether the accused kit, when assembled, operates with the exact sequence of mechanical interactions between the cam, selector, and disconnector required to create the claimed "standard" and "forced reset" modes.
• A second central question will revolve around indirect infringement and intent: Given that the accused products are sold as kits, the court will likely examine whether Plaintiffs can prove Defendant acted with the specific intent to encourage its customers to assemble and operate the devices in a directly infringing manner, and whether the components have any substantial non-infringing use.
• Finally, the case may involve a significant dispute over patent differentiation: With five patents asserted covering similar "forced reset" concepts, a key question will be how the claims of each patent are distinct. The court will need to determine if the accused product infringes the specific, and potentially overlapping, limitations recited in each of the '247, '784, '538, '159, and '403 patents independently.