NEW YORK A high-stakes insurance dispute between American International Group Inc. units and Texas-based firearm retailer Primary Arms LLC is now before the U.S. Court of Appeals for the Second Circuit, with oral argument scheduled this week. The core question is whether public-nuisance claims brought by New Yorks attorney general and the cities of Buffalo and Rochester trigger a commercial general liability insurers duty to defend, or whether the complaints allegations of deliberate conduct place them outside coverage. A federal district court ruled in August 2024 that AIG owed no defense, concluding that the pleadings described intentional business decisions rather than accidental occurrences. Primary Arms appealed, seeking a reversal that would restore insurer-funded defense in the underlying lawsuits. The underlying complaints assert that Primary Arms facilitated anonymous acquisition of unserialized firearm components, allegedly contributing to unlawful possession and downstream harm. The district court framed those allegations as intentional conduct baked into a marketing and sales model, not as accidents or mistakes. That finding mattered because standard occurrence-based liability policies are designed for fortuityevents not expected or intended by the insured. By treating the asserted injuries as the predictable result of intentional acts, the court concluded there was no occurrence, and therefore no duty to defend under the policies at issue. On appeal, the briefing highlights a familiar divide in coverage law. Insurers argue that public-nuisance suits aimed at alleged unlawful distribution schemes fall outside the scope of occurrence-based policies because they arise from purposeful strategies, not unforeseen mishaps. Policyholder advocates counter that the duty to defend is broad: if the complaint can be read to suggest even a potential for covered injury caused by an occurrence, carriers must fund a defense until facts are developed. They fault the lower court for weighting critical allegations in a way that, in their view, prematurely foreclosed that potential. Industry groups are watching closely. The Complex Insurance Claims Litigation Association filed an amicus brief supporting the insurers position, emphasizing that fortuity is the linchpin of liability insurance and that courts should avoid converting policies into backstops for deliberate business risks. The panelJudges Denny Chin, William J. Nardini, and Maria Arajo Kahncould also shape how courts treat similar questions beyond firearms. Appellate decisions in opioid coverage disputes have already leaned toward insurers, reasoning that complaints grounded in intentional distribution and marketing do not allege accidental injury. Insurers in the Primary Arms matter have additionally argued that the government suits do not seek damages because of bodily injury, offering a second pathway to defeating defense obligations. The practical stakes extend beyond legal theory. Duty-to-defend rulings often determine who pays for years of litigation, influencing settlement leverage and how quickly cases resolve. For retailers, a defense funded by insurers can be the difference between sustained courtroom resistance and early concessions; for carriers, an adverse decision could invite more defense demands in public-nuisance litigation where governments press broad theories of liability. The Second Circuits opinion will therefore serve as a reference point for parties calibrating risk across a growing docket of suits targeting sales and marketing of unserialized components. The case is captioned Granite State Insurance Co. v. Primary Arms LLC, No. 24-2748 (2d Cir.). AIG is represented by Willkie Farr & Gallagher LLP; Primary Arms by Lathrop GPM LLP; and the Complex Insurance Claims Litigation Association by Crowell & Moring LLP as amicus. A ruling clarifying how occurrence and duty to defend apply when complaints center on alleged intentional business conduct will echo across industries facing government-driven nuisance claims, not just firearms retail.