J. Trinidad Gomez, Jr., appeals his 324-month prison sentence on his guilty plea *365conviction of one count of conspiring to possess with intent to distribute 50 grams or more of a mixture or substance containing a detectable amount of methamphetamine. Gomez maintains that the district court clearly erred when it refused to reduce his offense level by two levels under U.S.S.G. § 2Dl.l(b)(ll).
We review a district court’s factual findings pertaining to sentencing adjustments for clear error. United States v. Villanueva, 408 F.3d 193, 203 & n. 9 (5th Cir.2005). Section 2Dl.l(b)(ll) allows a defendant in a drug case to receive a two-level reduction if he meets the criteria of U.S.S.G. § 501.1(a). United States v. Matias, 465 F.3d 169, 171-72 (5th Cir.2006).
Gomez claims that the district court erred when it determined that he had constructive possession of a firearm in connection with the offense. He suggests that the firearm found by the police in the residence he and his co-conspirators used in their drug-trafficking offense was possessed by someone else, not by him. He faults the Government for not presenting evidence that he in fact possessed the firearm.
Gomez withdrew his objection to the enhancement of his offense level under § 2Dl.l(b)(l), and indeed he does not contest the finding that a firearm was possessed as part of the offense. As the party seeking a sentencing adjustment under § 2Dl.l(b)(ll), Gomez had the burden of proving the facts supporting his entitlement to it. See United States v. Flanagan, 80 F.3d 143, 146 (5th Cir.1996). Thus, to satisfy § 5C1.2(a)(2), Gomez had to present evidence preponderating in favor of a finding “that he did not possess a firearm in connection with the drug conspiracy,” United States v. Vasquez, 161 F.3d 909, 911 (5th Cir.1998), or, more specifically, that any firearm used in the offense was used by another conspirator and not by him. Cf United States v. Wilson, 105 F.3d 219, 222 (5th Cir.1997). Gomez presented no such evidence; he merely pointed to what he deemed to be the Government’s lack of evidence on an issue on which the Government did not have the burden of proof. Given the unchallenged finding that a firearm was possessed as part of the offense, and given his failure to present any evidence to show that he was not the one who possessed it, Gomez has failed to show that the district court clearly erred in denying him an adjustment under § 2Dl.l(b)(ll).
AFFIRMED.