Fourth Circuit Limits the Guidelines Enhancement for Firearms with Altered Serial Numbers
The Fourth Circuit issued an important sentencing decision today for federal firearms cases. In United States v. Smith, No. 25-4065 (4th Cir. Aug. 25, 2026), the court held that the four-level enhancement under U.S.S.G. § 2K2.1(b)(4)(B)(i) does not apply merely because one or more serial-number markings on a firearm have been rendered illegible. The question is whether the firearm itself remains traceable. That distinction can have a substantial effect on a defendant’s Guidelines range.