United States v. Arnett, 327 F.3d 845 (9th Cir. April 24, 2003)(collateral estoppel prevented petitioner from relitigating an issue litigated and lost in an Oregon federal trial - that the short-barreled shotgun he used in both the California and Oregon robberies was an "antique" under 18 U.S.C. §§ 921(a)(3) and (a)(16)(A)).