Embodiments of the invention relate to a dynamic suppression mechanism for a semi-automatic firearm. An axial mass is positioned adjacent to multiple dynamic volume chambers, which are aligned within a housing. An aperture is provided within the mass and aligned chambers to accommodate the projectile. As the projectile travels through the aperture across the length of the housing, each of the chambers is subject to a dynamic expansion and contraction, with the dynamic volume change absorbing byproduct of the traveling projectile.