include the offense of unlawful possession of a firearm by a felon, unless the possession was of a firearm described in 26 U.S.C. § 5845(a).” § 4B1.2 app. n. 1. A shotgun modified so that it “has an overall length of less than 26 inches or a barrel or barrels of less than 18 inches in length” is a firearm described in § 5845(a). See 26 U.S.C. § 5845(a). As Lipscomb’s instant offense of possession of a firearm by a convicted felon does not have the use, attempted use, or threatened use of physical force as an element and is not an enumerated offense, the issue here is whether Lipscomb’s present offense “otherwise involves conduct presenting a serious risk of injury to another” under the residual clause of § 4B1.2(a)(2). See United States v. Serna, 309 F.3d 859, 862 & n. 6 (5th Cir.2002) (<HOLDING>). A. Applicability of the Categorical Approach
holding that north carolina crime of larceny from the person was a crime of violence under the residual clause of the career offender guideline holding a defendant could not receive an enhanced sentenced under the residual clause of  4b12a2 following johnson holding that the texas offense of possession of a prohibited weapon could only qualify as a crime of violence under the residual clause of  4b12a2 holding that california residential burglary is categorically a crime of violence under the residual clause of ussg  4b12a2 which requires the criminal conduct to present a serious potential risk of physical injury to another holding that possession of a weapon is not in an of itself a crime