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The BSS-MO-4U is the Bulgarian copy of SHM-41. It is also similar to the OM-14 and MUA gasmasks.
Mask overview Edit
The mask is a typical helmet styled rubber soviet mask. With two circular eyepieces that can fit antifog inserts but is has also a Tissot tube system. The valves are made out of metal which is painted dark green and has a 40mm GOST thread. The mask was made in 5 sizes.
The filter Edit
The filter (similar to the EO-12) is a big flat canister filter connected by a hose to the mask.