It's easy to see why someone would choose the AR-15 for home defense. These accessories will take the gun to the next level.

Imagine this for a moment: It’s 4 AM and you’re resting quietly on your bed. Suddenly, you hear your door break open from a violent kick. You hear the muffled sounds of men on one mission: To kill you ...

These weapons have been used in shootings from Sandy Hook to Las Vegas. This report is a part of "Rethinking Gun Violence," an ABC News series examining the level of gun violence in the U.S. -- and ...