Just because you have a right to do something doesn’t always make it the right thing to do. Take the grandfather of a young boy in Missouri.
He had a right to purchase and possess a .22 Magnum revolver.
He had the right to store his revolved in a loaded condition, unsecured, in a place easily accessible by children.
He had the right to invite his grandchildren to his house . . .
He had the right to have his nine-month-old grandson sleep in a crib in the same room in which he stored his unsecured, easily-accessible firearm.
He had the right to let his five-year-old child have unsupervised access to the room along with one of his playmates, while they had some sort of pretend gunfight.
If you’re childless and expecting a few rugrats to come over for a period of time, keep in mind that the definition of ‘adequate security’ for firearms changes dramatically when kids enter the picture. We’re not talking about a military-grade Sargent and Greenleaf safe here, but throwing the gun into a lockbox strong enough to delay an average five-year-old from breaking it open long enough for a responsible adult to resolve the situation.
If you need ideas, Chris Dumm has a review here. Dan Zimmerman has another one there. And the infosec professional who goes by the pseudonym Deviant Ollam has a nice (and definitely NSFW) review of a few popular lockboxes over yonder.