There is no argument that can logically be made that the AR-15 should be produced or should have ever been produced.
No hunter in their right mind would ever use the weapon because it would tear apart the meat the hunter was trying to gather in the first place.
This is a weapon of war. Period. Police should not even be allowed to have these weapons! The manufacturer should be out of business, and all existing guns should be confiscated and either destroyed or sold to the US military.