Gun Control & RKBA

Military grade weapons are designed not for the highest lethality in a single round, but to maximize the capabilities of a rifleman on the battlefield. To achieve this the AR-15 does two things.

First, it fires a small round at an extremely high velocity. The terminal ballistics are designed to not only achieve the primary wound, but focused on the secondary wound caused by the energy being dissipated. Organs are not punched thru, they and adjacent organs are shredded. The smaller round means less le is not guaranteed, but the wound is painful and debilitating. Purposeful from a military standpoint as it increases the medical and operational burden on the enemy to deal with the wounded.

Many states do not allow the AR-15 for hunting because the small calibre is considered inhumane because it leaves large animals wounded that a 30 calibre rifle would have killed.

Second, the AR-15 also is designed with minimal kick back allowing the shooter to quickly recover and shoot effectively again. This combined with large magazines allows for more bullets to be shot. The smaller calibre meaning more bullets as well which can be carried. Good from a military perspective as these can be used by those with less training. Bullets being cheap. Quantity over quality.