The Atchisson Assault Shotgun or AA-12
(AKA the Auto Assualt Shotgun) is the world's first
Full Automatic Shotgun.
It was developed by Maxwell Atchisson, and was developed priorly in 1972. It is capable of firing 300 rounds per minute.
(5 every second) Not only does the gun have a rapid fire rating, but is able to go as far as a normal assualt rifle.
It is capable of carrying 8 shells, with a drum barrel, 20 shells.
It can carry 3 types of ammunition: Buckshot, Frag-12 rounds, or Slugs.
Because of it's power, it is widely used in modern Military combat, and it now produced by the Military Police Systems Inc.
A Recent 2005 Model (Military Police Systems, or the MPS model for short,) has been issued and carries a slimer, lightweight look.
The gun weighs 5.2 Kgs with 8 shells, 7.3 with a drum barrel.
In other random events, the gun was featured on a 2007 episode of Future Weapons.
SWAT Member 2: Oh hell yeah dude! They were packing heat, but before anyone of em' could fire at me, the whole damn room was covered in bullets.
SWAT Member 1: Holy shit...
SWAT Member 2: No Kidding... it was great though.
SWAT Member 1: I bet it was.