A firearm suppressor with a monolithic core includes an elongate main body, a projectile borehole extending an entire length of the elongate main body such that the elongate main body includes both an entrance opening for the projectile borehole and an exit opening for the projectile borehole, and multiple hollow chambers. The entrance opening is structured to attach to an end portion of a barrel of a firearm. The hollow chambers are disposed along the length of the elongate main body and connect the projectile borehole to an outer surface of the elongate main body. A first one of the hollow chambers is disposed in a direction perpendicular relative to the projectile borehole, and a second one of the hollow chambers is disposed in a non-perpendicular direction relative to the projectile borehole.