[NOT FOR PUBLICATION] UNITED STATES COURT OF APPEALS FOR THE FIRST CIRCUIT No. 97-2219 UNITED STATES, Appellee, v. DANIEL J. ORTIZ-MEDINA, A/K/A FLAT TOP, A/K/A FLAT, A/K/A DEINI, Defendant, Appellant. APPEAL FROM THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF PUERTO RICO [Hon. Salvador E. Casellas, U.S. District Judge] Before Boudin, Circuit Judge, Coffin, Senior Circuit Judge, and Lynch, Circuit Judge. Lydia Lizarribar-Masini on brief for appellant. Guillermo Gil, United States Attorney, Camille Velez-Rive and Nelson Perez-Sosa, Assistant United States Attorneys, and Jose A. Quiles- Espinosa, Senior Litigation Counsel, on brief for appellee. March 20, 1998 Per Curiam. Upon careful review of the briefs and record, we perceive no merit in appellant's contentions. The district court did not abuse its discretion in refusing appellant's request to withdraw his guilty plea. The district court weighed the proper factors and sensibly concluded that appellant had not shown a fair and just reason to withdraw the plea. That conclusion was well supported by appellant's answers during the regular plea colloquy, along with the testimony of appellant's former attorney. We cannot say that the district court was required to adopt appellant's subsequent, contradictory statements, which the district court found to lack credibility. See United States v. Marrero- Rivera, 124 F.3d 342, 347-48 (1st Cir. 1997). Further, the district court did not abuse its discretion in imposing a 2-level weapons enhancement under U.S.S.G. 2D1.1(b)(1). That enhancement was amply supported by the government's version of the facts as agreed to by appellant, along with other information about the reasonably foreseeable violent nature of the conspiracy. At sentencing, the district court was not required to allow appellant to attempt to impeach a particular co-defendant's prior testimony on that point. SeeFed. R. Crim. P. 32(c)(1). Affirmed. See 1st Cir. Loc. R. 27.1.