In Mayor of Kingstown season 2, the AB, as in the Aryan Brotherhood, is a gang of white supremacists led by Gunner. When Mike struggles to release the gang leaders from prison in time, Gunner starts plotting against him.
Gunner from the AB is one of the gang leaders who involuntarily accepts Mike’s proposition to send the leaders inside the prison to choose new leaders. Once they are done doing that, all the charges against them will be dropped, and they will be released right away.
Gunner and the other leaders, including Bunny, enter the prison, and they successfully finish their jobs. Problems arise when the DA goes back on his word and slows down the process of dropping the charges against them.
The prison run by the AB
The gang leaders start losing faith in Mike, and things change when the prisoners get shifted. They are relocated to Anchor Bay, a prison where most of the guards are AB sympathizers.
The person in charge of Anchor Bay, Davidson, is also one of them. He allows the AB to live in peace. Sick of waiting for Mike, Gunner is one of those who feel they should start working the way they like. Gunner targets Bunny to send Mike a message, and Davidson allows him to do so. The AB put Bunny in the kill box.

The guards also allow the AB to murder whoever they want in broad daylight. They even offer them blades, weapons, and keys to set themselves free to do so. The guards only interfere when other gangs have the upper hand.
The AB is able to carry out drug deals better than other gangs from inside the prison because of these guards. With Davidson favoring them, all the other gangs struggle to make a living inside the prison.
Bunny tells Mike how, because of the AB, others are suffering. They can’t even do business in peace because the AB is allowed to use technology like drones inside the prison for drug distribution.
Mike later catches the AB gang member who is sending drones inside the prison. He grabs his phone and warns Gunner not to take favors or anything else. He should earn the way others do now.
Davidson’s death
Mike visits Davidson and questions him about putting Bunny inside the kill box. He asks him to leave Bunny alone. Davidson doesn’t cooperate and even threatens to beat Mike.
When Davidson pushes Mike further, Kyle walks in with a gun and beats Davidson down. The McLusky brothers leave after warning Davidson again not to touch Bunny.
Davidson comes seeking revenge when Mike is away on a day off. He follows Mike, who has left his wallet and gun at a bar, around the town. Mike retrieves his gun from the bar, and right outside, Davidson gives him a chase. Davidson intends to crash his car into Mike, but Mike manages to kill him with a few gunshots
Gunner’s death
The AB had plans to target Mike since he didn’t keep his promise. Time and again, the AB has resisted waiting around and done things the way they liked.
In the finale of Mayor of Kingstown season 2, the AB attacks Mike while he is on his way to meet Milo. Mike dodges their bullets and manages to take them all out.
Mike got late to the meeting, and because of that, Milo held Iris and Mariam as hostages. The attempt to rescue them ended with Milo escaping again and Mariam getting shot.

A frustrated Mike calls Carney and asks how things are going at Anchor Bay now that Davidson isn’t in charge. Carney claims that someone else will step up to fill the void.
Mike then lets Carney know that he is resetting the table and instructs him to get rid of the AB’s leader. Carney passes the message to Bunny’s friends inside the prison.
Raph and Big Hush’s crew prepare to take Gunner out. At night, Carney lets them walk free. He opens Gunner’s door, allowing Raph and Big Hush’s crew to enter his cell.
Raph tells Gunner that this is a message from the mayor, and they proceed to murder Gunner. Carney watches all of this take place just like how once the AB sympathizers did.
With Gunner dead, the AB may now stop targeting Mike and find a new leader for their gang. The question remains if they will avenge Gunner or not.
Also Read: Mayor of Kingstown season 2 review: Gritty thriller is slow on developments
