The Automatic Shotgun is an assault shotgun featured in The Ballad of Gay Tony.
Based on the AA-12, the Automatic Shotgun is available in two form; its more conventional form functions like a regular shotgun that fires buckshots, while the second, more devastating form, known as the Explosive Shotgun, is capable of firing "Frag-12" explosive round that can inflict heavy damage on vehicles (regular vehicles can only survive two direct shots from an Explosive Shotgun before burning) and can kill an enemy in one shot up close or strike an enemy down from a distance.
The regular Automatic Shotgun is a separate weapon from the Explosive Shotgun; this means that in order to switch ammunition, the player must discard their Automatic/Explosive Shotgun and lose their ammunition reserve. Regular Automatic Shotguns are distinguished by its red casing in the loading chamber, while Explosive Shotguns feature green casings.
Differences may also be noted in their ammunition capacities, while both variants are capable of holding 20 standard or explosive shells per magazine, the Automatic Shotgun can only hold 230 regular shells in reserve (the same carrying capacity as The Lost and Damned's Assault Shotgun), while the explosive variant can hold up to 580 rounds. In terms of rate-of-fire, both variants fare identically, although both variants do not fire fully automatic like its real world counterpart, or the Assault Shotgun. Rather, they behave like a semi-automatics in a similar fashion to the Combat Shotgun in GTA IV.
Armando Torres gives the player a regular version in "Corner Kids", while the Explosive Variant is received from Yusuf Amir in the mission "High Dive". After "High Dive", the player can purchase explosive shells from Armando.
Both variants of the Automatic Shotgun are also available in Multiplayer.
Spawns in Safehouse after completing 30 Drug Wars and High Dive and is loaded with explosive shells