AR-15 is needed because that is what Second Amendment requires. Currently, police and military use them as the most common personal weapon, hence the militia (a

AR-15 is needed because that is what Second Amendment requires. Currently, police and military use them as the most common personal weapon, hence the militia (as defined as all the able bodied adult male citizen by law) needs to use the same. It's needed by civilian precisely because it is a weapon of war. Read Washington DC. vs. Heller to understand this. Don't argue on the Internet.