Wall block and wall block system

A wall block comprising:

• a block body having opposed front and rear faces, opposed first and second side walls, and opposed and substantially parallel top and bottom surfaces;
• at least one core extending from the top surface to the bottom surface, the at least one core having opposed front and rear surfaces and opposed first and second side surfaces, the front surface of the core being positioned in closer proximity to the front face of the block body than the rear surface of the core and the first side surface of the core being positioned in closer proximity to the first side wall of the block body than the second side surface of the core;
• at least one pin hole positioned laterally to at least one of the surfaces of the at least one core, the at least one pin hole opening onto the top surface of the block body and extending at least a portion of the distance from the top surface to the bottom surface of the block body, the at least one pin hole having a core slot, the core slot opening onto at least a portion of at least one surface of the at least one core;
• and
• at least a first and a second elongate channel, the first elongate channel extending from the first side surface of the at least one core to the first side wall of the block body and the second elongate channel extending from the second side surface of the at least one core to the second side wall of the block body.