>> At one point, an officer walked into an MRI room, past a sign warning that metal was prohibited inside, with his rifle “dangling… in his right hand, with an unsecured strap,” the lawsuit said. The MRI machine’s magnetic force then allegedly sucked his rifle across the room, pinning it against the machine.

I'd consider it lucky that the rifle didn't discharge. All the safety systems in the world cannot be expected to protect against a random magnetic field doing who knowns what with the internals of a gun while it flies across the room. But this sort of unforeseen situation is why you never walk around with a finger on the trigger.