OPINION

Randy Reynolds was convicted by a jury of one count of possession of a weapon by a convicted felon in violation of 18 U.S.C.A. § 922(g) (West 2000). On appeal, Reynolds contends that the district court erred by not departing downward from the sentencing guidelines’ range for aberrant behavior and an over representation of his criminal history. We hold that the court did not err by not departing downward for aberrant behavior. We further hold that the court’s decision not to depart on the basis that Reynolds’ criminal history over represented his prior criminal conduct is not reviewable by this court. Accordingly, we affirm in part and dismiss in part.

Reynolds had an extensive criminal history. At sentencing, the district court denied Reynolds’ motion to depart downward for aberrant behavior on the basis that such a departure is not warranted if the conviction is not the defendant’s first offense. In United States v. Glick, 946 F.2d 335 (4th Cir. 1991), this court stated that:

[following congressional direction, the Sentencing Commission designed the guidelines to produce an appropriate sentence for a first offender. See 28 U.S.C.A. § 994(j) (West Supp. 1991). Aberrant behavior, therefore, means *155 something more than merely a first offense. A single act of aberrant behavior suggests “a spontaneous and seemingly thoughtless act rather than one which was the result of substantial planning because an act which occurs suddenly and is not the result of a continued reflective process is one for which the defendant may be arguably less accountable.”

Id. at 338 (quoting United States v. Carey, 895 F.2d 318, 325 (7th Cir. 1990)). Reynolds was not eligible for a reduction in the offense level for aberrant behavior because the conviction was not Reynolds’ first offense. See United States v. Withrow, 85 F.3d 527, 531 (11th Cir. 1996) (departure is appropriate if defendant is “a first-time offender and the crime was a spontaneous and thoughtless act rather than one which was the result of substantial planning”); United States v. Grandmaison, 77 F.3d 555, 563 (1st Cir. 1996) (departure for aberrant behavior is available to first-time offenders). Accordingly, we affirm the court’s decision not to depart for aberrant behavior.

Reynolds also moved for a downward departure on the basis that his criminal history category over represented the seriousness of his prior criminal conduct. The district court thoroughly reviewed its authority and discretion to depart outside the range established by the sentencing guidelines. The court found that Reynolds’ pri- or criminal convictions were already taken into consideration by the sentencing guidelines. The court concluded upon a thorough review of the record that there were no factors present that took Reynolds’ ease out of the heartland of cases.

A sentencing court’s denial of a request for a downward departure is reviewable only when the sentencing court bases its decision on “the mistaken view that it lacked the authority to depart.” United States v. Bayerle, 898 F.2d 28, 31 (4th Cir. 1990). In the instant case, the district court recognized its authority to depart downward, but declined. Accordingly, this claim is not reviewable and is dismissed.

For the reasons discussed, we affirm the court’s decision not to depart downward for aberrant behavior and we dismiss as unreviewable Reynolds’ claim that the court erred by not departing downward on the basis that his criminal history category over represented his prior criminal conduct. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

AFFIRMED IN PART; DISMISSED IN PART.