Soviet SCHMS Respirator

The SCHMS supposedly was designed by the East Germans to be a more effective mask that the military GP5 variant the M41, the lenses are designed so that a sniper or a soldier needing to use optics can raise them to the mask more easily. Adopted throughout the Warsaw Pact. The mask is also referred to as the "Deaths Head" mask due to it's skeletal appearance.

Soviet PDF-D Childs Respirator

The PDF series of Respirators were designed for children who were to young to wear the GP5, it's a latex mask with straps and a hose that cannot be removed.

Soviet PBF Respirator

Soviet/Russian PBF respirator, An interesting M17 clone, it uses a different filter shape than the standard clones and is generally lighter, rather than using straps it has a hood design similar to other latex Soviet masks.
It is still used by many Eastern European police forces as a riot control mask.

Soviet PMG respirator

The PMG was developed by the Soviets to utilize a lightweight combat effective mask, similar to the Nato masks. It has a skull faced design and was used by Valve in HL2 as the basis for the Metrocop mask.

Soviet MM1 Respirator

A mask designed in the 1950s for Tank Crews, it uses two front lenses a voice diaphragm and takes a filter using the GP5 intake/outtake valve at the bottom of the mask.

Soviet/Russian GP5 Respirator

The Soviet GP5 Civilian respirator is the most common mask on the surplus market and perhaps also the most famous gas mask ever made, it's a simple latex hood with two lenses and a filter intake and outlet valve at the bottom. Chances are if you see a TV show or film using cheap gas masks, they'll use the GP5.

Polish MP4 Respirator

Polish MP4 Respirator nicknamed the "Bulldog".
It's a basic clone of the US M17 mask similar to other Warsaw PACT clones such as the OM10, M10M and the PDE-1 respirators. The most interesting variant of the M17 clones was the PBF mask which took circular internal filters and was smaller than the other clones.