“Florida law allows young adults those it categorically deems unlawful and irresponsible (in the gun law) ― to serve in the military and in law enforcement,” NRA attorneys wrote in a brief last year. “It also allows young adults to serve on a jury, enter into contracts, sue and be sued, get married, and own property. Florida at once deems young adults to be law-abiding and responsible enough to enforce the law but not law-abiding and responsible enough to be trusted to follow it.”