Owning a product that might malfunction isn’t enough for Article III standing—the defect must actually manifest. That’s the message from Glasscock v. Sig Sauer, Inc., __ F.4th __, 2026 WL 2054200 (8th Cir. July 16, 2026), where the Eighth Circuit vacated class certification and dismissed the case after the named plaintiff admitted his firearm had never malfunctioned.
Joshua Glasscock bought a Sig Sauer P320—a pistol that lacks an external thumb safety and has a light trigger pull. He claimed that combination made the gun defective and prone to going off accidentally, and he sued under Missouri’s consumer protection statute. A district court certified a class of Missouri P320 buyers. But Glasscock admitted his gun never accidentally discharged, and he’d had “no issues with the pistol.”
That admission proved fatal. The Eighth Circuit applied its manifest defect rule: buying a product that might be defective isn’t enough for standing. The defect has to actually show up in the plaintiff’s product. Since Glasscock’s gun never malfunctioned, the alleged defect never “manifested itself” for him, and he lacked Article III standing. The Eighth Circuit vacated the district court’s class certification ruling on that basis.
The Eighth Circuit rejected Glasscock’s fallback arguments. It disagreed that the P320 has a “universal design defect” baked into every unit because saying a product increases the risk of harm isn’t the same as showing the harm actually happened. The court distinguished this from an earlier plumbing case where pipe cracking had physically occurred in every fitting, a true manifested defect.
The court also disagreed that Glasscock could establish injury with a “benefit of the bargain” theory—that the gun is worth less than he paid because of the defect. The court called this “wholly speculative,” resting on only an expert’s unsupported say-so, and fundamentally at odds with the manifest defect rule.
Because Glasscock was the only named plaintiff, his standing failure didn’t just defeat class certification—it stripped the court of subject-matter jurisdiction entirely. The Eighth Circuit vacated the certification order and directed the district court to dismiss the case outright.