Heavily regulated? An AR15 isn't regulated any more than any other semi-auto rifle.
Is one of these regulated more than the other? They're both the same caliber, .223. They're both semi-automatic. The top gun can have magazines that hold 5, 10, 20, or 30 rounds. Same as the bottom one. The bottom one has an adjustable stock, a pistol grip, and raised iron sights. None of which affect the firing of the weapon. The rate or velocity of fire. Are they the reason people want to ban this dreaded "assault" rifle and not the top one? And why exactly, is the top one called a hunting rifle and the bottom one an assault rifle when they are basically the same thing?
BTW, the top rifle is just as "capable of mass murder" as the bottom one. So is my Kimber Custom II .45 acp.