A Virginia man charged with carrying a 9mm Glock 17 to BWI Airport (in Maryland) was sentenced to 6 months unsupervised probation. They don't give any more details, other than that the guy was extra dangerous because he managed to cram 48 rounds into his pistol:

Charging documents say Sackie was walking with his daughter near the D Pier at BWI Marshall Airport when a Transportation Security Administration officer noticed "a bulge on his hip that would indicate a firearm." The weapon was loaded with three magazines, each containing 16 rounds.