Below is a video clip of a news report, discussing how a 15 year old boy used his father’s “assault rifle” to defend himself and his younger sister against home invaders.  The suspects were later apprehended as they sought medical attention for their wounds, and no injuries to either child was reported:

Note: I do find it unfortunate that the news referred to this self defense gun as an “assault rifle.”  I think the term Modern Sporting Rifle is much more accurate.