Think you’re an adult when you turn 18-years-old? Oh sure, you can vote and fight in wars with guns the military gives you. But you can’t buy a handgun:

The 5th U.S. Circuit Court of Appeals in Houston rejected the NRA’s argument that 18- to 20-year-olds had a right to buy the guns under the Second Amendment to the U.S. Constitution, as well as the equal protection clause of the Fifth Amendment.

A unanimous three-judge panel said Congress, in a law dating from 1968, adopted the sales ban to help curb violent crime. It also said that the nation’s founders and 19th-century courts and commentators believed that disarming specific groups did not trample on the right to bear arms.

More at the link.

Here’s a PDF of the decision.