Like you said, this is one of the many ways to chisel away at guns. We need to address each and everyone of them full force, and we can not let them wear us down with the constant barrage.
When it comes to further cases to battle a loss or restore lost Rights we need to look at regulations like "no personal protection, law enforcement training, special tactical shooting skills, police, security, military or para-military." These are more applicable to the Second Amendment than the hunting tradition that most public officials and anti-gunners use to pacify us into giving up our Rights one by one.