From the common sense view point, It means that all arms hold equal status in the constitution. Everything from a BB gun to a fully auto 50 cal. If regulation of one type gun is constitutional, there is nothing in the constitution to say regulation of another type is not. Yes or no, ---- is it constitutionally acceptable for us to highly regulate the ownership, transport, and usage of a fully automatic 50 cal rifle? If so, then it is constitutionally acceptable to regulate all other arms the same way. I am not advocating regulation as stringent as required for a fully automatic 50 cal, but there is nothing in the constitution to prevent it.