Dave: there is no difference between “arms” (using the classical definition understood and employed by the authors of the Constitution) and “armaments”; there is no difference between “ordnance” and “armaments”. Both “arms” and “ordnance” are examples of “armaments”.
There are differences between “arms” and “ordnance”
A brief description of our National Guard system:
The National Guard, by federal law, is considered the “organized militias” of the various states, and is typically under the control of the state’s governor (supreme executive), with operational command vested in a professional military officer.
The National guard is subject to call-up by either the state or federal governments in times of emergency, such as disaster relief or to augument regular military forces in time of hostilities.
We’ve been very fortunate as a country in presenting a fairly unified front towards the world and having a largely harmonious history, speaking in a intra- and interstate manner. The Civil War, or course, being the notable exception.
There was never a guarantee of such a situation, nor is there one of a continuation of this happy state of affairs. This American, and I’m sure the overwhelmingly vast majority of my fellow citizens, would hope so, but hope alone is not sufficient.
Just social policy, benevolent and equitible application of law, and an educated populace are probably the surest, bestest guarantee against the sort of social spiral into either anarchy or tyranny.
But, and speaking strictly for myself here, a few dozen million armed citizens, also recognized under federal law as the "unorganized militia, even if armed just with hunting rifles or semi-auto variants of military rifles, doesn’t hurt things any either.
In the undesirable event of ever having to utilize both the organized and unorganized militias (the National Guard and a mass of armed citizens) to oppose a tyrannical federal government, the National Guard, which is outfitted with Tanks, Artillery, Helicopter Gunships and Jet Fighters (ordnance) will bear the brunt of the fight; the armed citizenry would be expected to engage in a guerilla-mode of warfare, acting as spies (reconnaissance), saboteurs (bridges, railways, telecommunications links, etc.,) and possibly as snipers against the federal military’s command structure.
And forget Red Dawn scenarios of camouflaged rebels running throught he woods; the average guerilla could pass you on the sidewalk without drawing a second glance, in much the same way that the VC guerillas were able to effectively hide amongst the general population of the Vietnamese people.
OTOH:
The aquisition of firearms by criminally disposed individuals or groups is certainly an alarming prospect; the possibility that further restrictions may be warranted to stem this flow of weapons is worthy of consideration.
But the policies and legislation offered up for consideration by pro-control advocates and groups has been largely rejected not only by pro-gun groups but also by the majority of state legislatures and our Congress as being restrictive against law-abiding citizens while not truly or effectively addressing the issues of criminal misuse of firearms or of aiding law enforcement in stemming the illegal flow of firearms to the designated undesirable individuals and groups.
The pro-gun groups also hurt themselves and their public image with singularly myopic solutions (“More Guns, Less Crime!”) to the problem of firearm proliferation amongst the criminally minded.
The aforementioned cultural and political schism over this issue has led to too much distrust, too much rancor, for there to be any meaningful dialogue on the issue at the national level.
Just look at how contentious the issue is here in GD; a not altogether inaccurate microcosm of the larger debate.