United States Court of Appeals
                            FOR THE EIGHTH CIRCUIT
                                    ___________

                                    No. 04-2557
                                    ___________

United States of America,                *
                                         *
             Appellee,                   * Appeal from the United States
                                         * District Court for the District
      v.                                 * of Nebraska.
                                         *
Rigoberto Islas, also known as           *    [UNPUBLISHED]
Oscar,                                   *
                                         *
             Appellant.                  *
                                    ___________

                              Submitted: July 26, 2005
                                 Filed: August 12, 2005
                                  ___________

Before WOLLMAN, BEAM and RILEY, Circuit Judges.
                          ___________

PER CURIAM.

      On March 26, 2004, Rigoberto Islas pled guilty to Count I of a superseding
indictment alleging that between January 1, 2000, and on or about November 21,
2003, Islas knowingly conspired to distribute and possess with intent to distribute 500
grams or more of methamphetamine. The district court1 sentenced Islas to 235
months' imprisonment and five years supervised release. Islas appeals his sentence,



      1
      The Honorable Lyle E. Strom, United States District Judge for the District of
Nebraska.
arguing that under Blakely v. Washington, 

(2004),2 the federal
sentencing guidelines are unconstitutional and that because his enhancement was
based upon judge-found facts, we should remand this matter for resentencing,
avoiding all enhancing provisions not admitted by Islas or proven to a jury beyond
a reasonable doubt. For the reasons stated herein, we affirm.

       Prior to sentencing, Islas challenged the government's proposed upward
adjustment in the Presentence Investigation Report (PSR) based upon Islas' role in the
offense. At sentencing, the district court credited the stipulated testimony of Gary
Olsen who substantiated the offense conduct contained in the PSR. According to that
testimony, the district court determined that more than five people were involved in
the conspiracy, that it was an extensive conspiracy involving substantial amounts of
methamphetamine and that Islas directed and supervised Olsen and others within the
conspiracy. Accordingly, the district court began with a base offense level of thirty-
eight, which was adjusted upward three levels under section 3B1.1 for Islas'
managerial role, and then adjusted downward three levels for his acceptance of
responsibility, resulting in an offense level of thirty-eight. The sentencing range was
235 to 293 months. The district court sentenced Islas at the bottom of the range.

       On appeal, Islas does not challenge the facts underlying the district court's
application of the sentencing enhancement,3 but rather the district court's
determination of those facts rather than presenting them to a jury. Because Islas
raises this argument for the first time on appeal, we review for plain error. United


      2
       The district court sentenced Islas prior to the Supreme Court's decision in
United States v. Booker, 

(2005) and we now view his claims in that
light.
      3
       Regardless, based upon the evidence presented at sentencing, there was no
error in the district court's conclusion that Islas should receive the three-level
adjustment under U.S.S.G. § 3B1.1(b).

                                         -2-
States v. Pirani, 

, 549-50 (8th Cir. 2005) (en banc). We must consider
whether the district court's application of the enhancement and its use of the
guidelines themselves as mandatory, rather than advisory, constitute plain error. It
is Islas' burden to establish that the district court's use of the guidelines in sentencing
affected his substantial rights. 

That is, he must show that there is a
reasonable probability that the district court would have imposed a more favorable
sentence under the advisory guidelines regime mandated by Booker. 

Islas
is unable to meet this burden. Although the district court sentenced Islas at the
bottom of the applicable sentencing guidelines range, that alone is not enough to
make the required showing. 

no other evidence in the record to indicate
any reasonable probability that the district court would have imposed a lesser
sentence had it applied the guidelines in an advisory fashion. In addition, Islas'
sentence, which resulted from a correct application of the guidelines and fell within
the calculated sentencing range, was reasonable in light of the sentencing factors
listed in 18 U.S.C. § 3553(a). See 

. Accordingly, we
affirm.
                         ______________________________




                                           -3-