Supremes taking a 2A gun case

"New York’s ordinance allows people licensed to have handguns to carry them outside the home to gun ranges in the city. The guns must be locked and unloaded.

The city residents who filed suit want to practice shooting at target ranges outside the city or take their guns to second homes elsewhere in New York state."

Am I reading this right? They can't leave the City with their guns? Or maybe if they leave, they can't return with the gun?
 
I don't see this as a major 2A case , compared to Heller or McDonald, but it is a small test to check the veracity of the new court.

What is even bigger is regardless of the result it will solidify to the "Dems" what may happen if Ginsberg leaves the SCOTUS.