USAS 12

The  is a fully automatic shotgun that appears in Call of Duty: Modern Warfare 3.

Survival Mode
The USAS 12 is available in Survival Mode at level 6 and costs $2000. It is also carried by the Suicide Bombers.

Multiplayer
The USAS 12 is unlocked at level 4, as soon as Create-A-Class is available. The USAS-12 features a lower rate of fire compared to the other automatic shotgun, the AA-12; however, it has much more carried ammunition (36 total rounds as opposed to 16). In addition, the USAS 12 has the smallest magazine size of all the shotguns and one of the slowest reloads, necessitating Extended Mags and/or Sleight of Hand. Nevertheless, the USAS 12 has the highest range of any of the shotguns (tied with the SPAS-12), but has very low damage at the edge of its range. Damage or Range is highly recommended, as with all shotguns. At medium range with the Damage proficiency, most kills will take one or two shots.

One unique hidden feature of the USAS-12 is that it gives the user an 50% increased sprint time when equipped on all platforms, similar to the effects of Extreme Conditioning. This effect can be combined with Extreme Conditioning perk to allow the player to sprint for unparalleled distances. It is assumed that this was put in place to improve the USAS 12's relatively mediocre stats.

Weapon Attachments

 * Grip - Unlocked at weapon level 2.
 * Silencer - Unlocked at weapon level 5.
 * Red Dot Sight - Unlocked at weapon level 12.
 * Holographic Sight - Unlocked at weapon level 17.
 * Extended Mags - Unlocked at weapon level 26.

Profeciencies

 * Kick - Unlocked at weapon level 4.
 * Focus - Unlocked at weapon level 9.
 * Attachments - Unlocked at weapon level 14.
 * Melee - Unlocked at weapon level 19.
 * Range - Unlocked at weapon level 23.
 * Damage - Unlocked at weapon level 28.

Video
Video:Modern Warfare 3: Kill Confirmed Gameplay

400px|Video:USAS Shotgun Gameplay W/ Commentary

USAS 12 in action.

Trivia

 * It has the smallest magazine size and rate of fire of any fully automatic weapon, only having six shells before having to reload.
 * It is the second automatic shotgun in the Call of Duty series, the first being the AA-12.
 * The USAS 12 has the same firing sound as the M1014 does in Modern Warfare 2.
 * The Marksman III challenge is incorrectly achieved upon 300 kills with this weapon as opposed to the usual 75.

USAS 12