yes, and just as muskets were probably the most effective weapons for the resistance then, so RPGs and IEDs are, today. And so (following logically from the 2nd amendment) citizens should be able to buy and stock them. Or can the potential oppressors decide what weapons the opposing militia may have?
How can you promote handguns, but not RPGs (if the logic of promoting handgun availability is that it enables resistance to tyranny)? Or, looking at it the other way, how can you ban RPG/IED purchases, but not ban handguns?