Affirmed by unpublished PER CURIAM opinion.

Unpublished opinions are not binding precedent in this circuit:

Markeith Hart appeals from the 87-month sentence imposed after he pleaded guilty to possession of an unregistered National Firearms Act weapon, in violation of 26 U.S.C. §§ 5841, 5861(d), 5871 (2012). The district court departed upward based on U.S. Sentencing Guidelines Manual §§ 4A1.3, 5K2.21 (2014), concluding that dismissed conduct and a substantially underrepresented criminal history supported the departure. Finding no: error, we affirm. .,

We review a sentence for reasonableness, applying “a deferential abuse-of-discretion standard.” Gall v. United States, 552 U.S. 38, 41, 128 S.Ct. 586, 169 L.Ed.2d 445 (2007); United States v. Lymas, 781 F.3d 106, 111 (4th Cir. 2015). Because Hart did not object to the upward departure at sentencing, we review for plain error whether the court pfocedurally erred in departing upward. United States v. Olano, 507 U.S. 725, 732, 113 S.Ct. 1770, 123 L.Ed.2d 508 (1993); United States v. Lynn, 592 F.3d 572, 577 (4th Cir. 2010). *

Hart argues that the court did not explain why criminal history category IV substantially underrepresented the seriousness,of his criminal history or the likelihood that he would commit other crimes. He further contends that his prior convictions had already been counted in determining his criminal history category and were impermissibly considered under § 5K2.21 and that the district court did not identify any additional 'conduct that supported application of § 5K2.21.

When reviewing a variance or departure, this court considers whether the sentencing court acted reasonably both with respect tb its’ decision to impose such a sentence and with respect to the extent of the divergence from the sentencing range. United States v. McNeill, 598 F.3d 161, 166 (4th Cir. 2010). An upward departure may be warranted if “reliable information indicates that the defendant’s criminal history category significantly underrepresents the seriousness of the defendant’s criminal history or the likelihood that the defendant will commit other crimes.” USSG § 4A1.3(a)(l). A'district court may base an upward departure pursuant to § 4A1.3 on a defendant’s prior convictions, even if those convictions are too old or otherwise not counted in the calculation of the Sentencing Guidelines range. See USSG § 4A1.3(a)(2).

When the district court applied an upward departure in part under USSG § 5K2.21, it permissibly relied on the na *211 ture and seriousness of the dismissed count of felon in possession of a firearm. Reviewed as a whole, this record supports the court’s consideration of the dismissed count and reveals that no conduct or criminal history was impermissibly double-counted. Further, the court gave an adequate explanation of its reasons for departing upward based on the underrepresentation of Hart’s criminal history. Thus, no error, plain or otherwise, resulted.

Accordingly, we affirm the sentence. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before this court and argument would not aid the decisional process.

AFFIRMED.