After Brian Briggs pleaded guilty to drug-conspiracy and money-laundering charges, the district court 1 sentenced him below the Guidelines range and statutory minimum to 180 months in prison. Seeking leave to withdraw, his counsel has filed a brief under Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), arguing that the court’s sentence is unreasonable because the court did not adequately address the substantial-assistance criteria in U.S.S.G. § 5K1.1. In a pro se supplemental brief, Briggs raises concerns about the quality of the legal representation he received, and suggests that a lower sentence was warranted based on his assistance to the government.

Briggs pleaded guilty pursuant to a plea agreement that contained a waiver of his right to appeal his conviction and sentence. We will enforce the appeal waiver. Briggs’s appeal falls within the scope of the waiver, which by its terms applies in a direct criminal appeal unless the sentence imposed was above the court-determined Guidelines range. Further, the record reflects that Briggs entered into both the waiver and the plea agreement knowingly and voluntarily, and we find that no miscarriage of justice would result from enforcing the waiver in this ease. See United States v. Jennings, 662 F.3d 988, 990 (8th Cir. 2011) (court should enforce appeal waiver if both waiver and plea agreement were entered into knowingly and voluntarily, appeal is within scope of waiver, and no miscarriage of justice would result), cert. denied, -U.S.-, 132 S.Ct. 2407, 182 L.Ed.2d 1043 (2012); see also United States v. Azure, 571 F.3d 769, 772 (8th Cir. 2009) (de novo review of whether defendant waived right to appeal sentence).

Although the pro se brief suggests that Briggs is unsatisfied with his counsel’s assistance, we will not consider ineffective-assistance claims in this direct criminal appeal. See United States v. McAdory, 501 F.3d 868, 872-73 (8th Cir. 2007). Finally, having independently reviewed the record under Penson v. Ohio, 488 U.S. 75, 109 S.Ct. 346, 102 L.Ed.2d 300 (1988), we find no nonfrivolous issues outside the scope of the appeal waiver. Therefore, we dismiss the appeal, and we grant counsel’s motion to withdraw.