A sound suppressor assembly for use in providing a means to maximize firearm suppressor efficiency with regards to maximizing sound attenuation while minimizing physical size and weight and minimizing firearm backpressure and manufacturing costs. A sound suppressor assembly comprising a closed inner cylinder that is received within a separate outer cylinder having a substantially larger diameter and substantially longer length than said inner cylinder. A sound suppressor assembly comprising a plurality of apertures, or openings, that are coaxially aligned within the assembly, thus providing a means to attach said sound suppressor assembly to a firearm muzzle at a proximal planar end of the present invention, for a bullet and ejection mass to enter a proximal end of said inner cylinder and for said bullet and ejection mass to exit through a distal end of said sound suppressor assembly of the present invention.