USAS-12

The USAS-12 is a Korean-made, automatic, 12-gauge shotgun developed by Daewoo Precision Industries. It was a very sucessful shotgun which was based on the design from Atchisson Assault Shotguns such as the AA-12. This is why it has some features of small arms such as the M16 Assault Rifle and other Korean-made firearms. It is capable of using 10-shell box magazines, or 20-round drum magazines.It can be compared in all areas to the American AA-12 shotgun.

Battlefield: Bad Company
The USAS-12 is obtained by completing a certain "Find-All-Five" challenge. One must simply check their stats online (at http://badcompany.ea.com/) and it will be unlocked the next time the player signs in.

Only accessible through multiplayer, it is issued to the Demolition class. It is the only automatic shotgun, but it is balanced out by a lower rate of fire. It is capable of killing within 3 or so shots. Its main downsides come from its low magazine size (10 shells) and fairly uncontrollable recoil.

Battlefield: Bad Company 2
The USAS-12 returns in Bad Company 2 with some adjustments: faster rate of fire and a 6 round magazine. It can also be accessed by all classes, not being a class specific weapon, but must be unlocked first by reaching level 21. In single player the USAS-12 comes with a 12 round magazine. The USAS-12 has the exact same weapon stats as the Saiga 20K except for it being automatic. Due to its high lead delivery, it's more effective than other shotguns at slightly longer ranges.With the 12g Slugs, it can be used as a sort of burst-fire assault rifle ( although with a very small magazine)