The Smith & Wesson Assault Shotgun, or AS for short, is a prototype automatic shotgun.
The AS was an entrant into the US Army's Close Assault Weapon System program in the 1980s. It was meant as a competitor to the Heckler & Koch HK CAWS. The AS was not successful and by 1985, Smith & Wesson decided to stop shotgun manufacturing entirely as they felt that it was not a profitable venture for them at least.
The AS could fire standard 12-gauge buckshot rounds or specially-made 12-gauge flechette shells.
The AS had 3 variants; the AS-1, AS-2 and AS-3.
The AS-1 was semi-automatic only.
The AS-2 could fire in three-round bursts, as well as semi-automatically.
The AS-3 could fire in three-round bursts, as well as fully automatically.