This is totally incorrect. The word "arms" meant weapons of offense when the Constitution was written.
When the Constitution was written cannon and warships were privately owned. If the equivalent were true today I'd have a couple of GE mini-guns and a Howitzer or two laying around the house and Bill Gates and Warren Buffet would have a couple of Carrier Batttle Groups between them.
Now if I could just get my CongressCritter to tell me how I could get my hands on some Letters of Marque and Reprisal....
Nice to see you about the board, ma'am.
L