The FBI dispels once and for all the wild media conjecture that an AR-15 was used (or any other civilian faux "assault rifle" for that matter) in the so called "Navy Yard Shooting" of 2013.
Rather, they confirm that their official view is a "Joe Biden Gun" (i.e. shotgun) was used - the very gun Joe Biden officially recommended on the record as the gun home owners ought to buy instead of an AR-15.
More on this event:
The Navy Yard Shooting Media Hoax