The SCOTUS accepted a case about a felon in possession of body armor.
https://www.supremecourt.gov/search.aspx?filename=/docket/docketfiles/html/public/16-1371.html
16-1371 BYRD, TERRENCE V. UNITED STATES
Terrence Byrd entered a conditional guilty plea to charges of possessing heroin with intent to distribute in violation of 21 U.S.C. § 841(a)(1), and possessing body armor as a prohibited person in violation of 18 U.S.C. § 931(a)(1).
http://caselaw.findlaw.com/us-3rd-circuit/1777387.html
https://www.supremecourt.gov/search.aspx?filename=/docket/docketfiles/html/public/16-1371.html