Infringed means interfered with in a minor way; obviously the text of the Second Amendment means that we of course should neither interfere with RKBA in a major way.
Hopefully with the new Supremes we may be getting back to sanity with regard to the 2nd A.
Scalia was not great on 2nd, he clearly stated that the right to keep was not unlimited. What ever the courts come up with with, it will limit gun rights in some manner, count on it.