Also question is, what is considered a destructive device?
Destructive device refers to a firearm or explosive device such as grenades, mines, missiles, weapons and semi-automatic shotguns. Few states have banned transfer of destructive devices to civilians, although federal laws allow destructive devices.
Likewise, is a suppressor a destructive device? NFA firearms include machine guns, short-barreled rifles and shotguns, heavy weapons, explosive ordnance, silencers and "any other weapon" (AOW), such as disguised or improvised firearms. Explosive devices such as bombs or grenades are regulated as NFA firearms (destructive devices).
Keeping this in consideration, can you own a destructive device?
California law does allow you to possess otherwise illegal destructive devices if you have a permit to do so. These permits are issued by the California Department of Justice. Having a valid permit to possess explosives is what is known as an “affirmative defense” to the crime.
Is an AR 15 an NFA firearm?
Short Barreled RiflesThe NFA regulated rifles with barrels shorter than 16 inches. Any rifle sporting a barrel shorter than 16 inches is a short barrelled rifle. AR, AK, and even FAL pistol exist as pistols and not rifles.