SPAS 12

How To Obtain
Get to Level 30, you can then equip it in your Primary Slot.

Trivia

 * It is the second unlockable shotgun out of the 3 shotguns in the game, the first being the M500 and the third being the AA12.
 * SPAS 12 and M500 are the only 2 shotguns with the same Rate Of Fire.
 * SPAS 12 is nearly a direct upgrade to the M500 for nearly every stat, having a higher damage output, mag size, and damage.