United States v. Huitron-Guizar, 678 F.3d 1164 (10th Cir. May 7, 2012) (affirming conviction of being an illegal alien in possession of firearms in violation of 18 U.S.C. 922(g)(5)(A), 924(a)(2), rejecting claim that lawful sporting purposes exception to Sentencing Guideline should apply to defendant's offense: that exception does not, by its terms, apply to offenses under (a)(4). U.S.S.G. 2K2.1 cmt. n.6).