[SigmundA]

Arm: a means (such as a weapon) of offense or defense.

Firearm: a weapon from which a shot is discharged by gunpowder.

Small arm: portable firearms, especially rifles, pistols, and light machine guns.

The second amendment as strictly read says only "arms" the definition which has not changed since it was written only the lethality of the arms has increased through technological advancement culminating in nuclear arms.

A "destructive device" is a type of arm as defined by the 1934 Firearms act nearly 150 years after the second amendment was written.

A machine gun is not considered a destructive device but is still regulated and obviously still a type of arm.

So clearly you are ok with adding restrictions on arms not specifically laid out in the constitution if you are ok with the regulation of "destructive devices" and "machine guns" semantic word games aside. Otherwise if you strictly adhere to the wording of the amendment then there should be no regulation on the type of arms a citizen may own up to including nuclear arms.