Thru the interpretation of the 2nd A. 1. The meaning of "a well regulated militia" (regulated by who?, are only militia members protected?) 2. The meaning of "Arms" (what is covered in the meaning and what is not) 3. The meaning of "Infringed" can even be viewed as any "violation" of the right or only past a certain point of "violation" of the right. The very reasons this thing has been in debate for decades by so many. Not gonna be settled here, or anywhere else. It will be a ongoing debate IMO. With scholars, experts and passionate laymen on both sides. Of course I am a huge anti gun guy for even bringing this stuff up I guess?