A lawsuit over the legality of the magazine ban and background check laws was filed by 54 of the 64 elected county Sheriffs and 21 sporting and outdoor groups and Colorado companies. The suit alleged that the large-capacity magazine ban violated the Second and Fourteenth Amendments, and argued that the law would be impossible to enforce.54 Sheriffs v. Hickenlooper, Complaint for Declaratory and Injunctive Relief
