Earlier quoted context omitted.
Isn't the 2a just a "well armed malitia"? Maybe an RPG is more than well armed, but encryption?
"well-regulated militia," but it's pretty much an open question how much that actually has to do with the right described in the second clause. Gun rights activists tend to down-play that first bit, as it implies a collective perspective that they find conceptually incompatible with unlimited individual gun ownership rights.
Gun rights antagonists tend to downplay that bit, as it implies an individual perspective that they find conceptually incompatible with tightly-controlled gun ownership permissions.