The Mississippi Aryan Brotherhood is a large racist prison gang based in the Mississippi state prison system. Despite the similarity of its name, it has no connection to the "original" Aryan Brotherhood, based in California and the federal prison systems.
The logo of the Mississippi Aryan Brotherhood consists of a highly-stylized rendition of a combined A and B (many people confuse it with the letters P or R). Typically SS bolts appear within the AB and a swastika next to it. Also part of the symbol is the number 13 (standing for M or Mississippi) and one or more other numbers, which can vary.