Yes, chip, it almost entirely limited only the federal government.
You quoted the 2A. Where does it say that the states shall not infringe it when, at the very moment of its adoption, every state had some sort of limitation - legal and/or functional - on RKBA?
As I recall, the Heller opinions covered this ground. The briefs, even moreso.
If the constitution didn't specifically say that something was prohibited to the states, then it didn't mean that it was prohibited to the states.
Why does 1A specify the federal government (Congress), yet 2A specifies no level of government? Was it just sloppy writing, or did the founders intend for "Congress shall make no law..." and "...shall not be infringed"?
And if the founders' intentions weren't clear enough to begin with, the 14th amendment, as specifically incorporated by McDonald, even further clarifies that 2A applies also to the states.