By using the internal cheek filters, the MP4 gas mask provides a wider field of view than more traditional gas masks. First production models were made from olive-green rubber, however, it wasn't until 1983 when they changed the mixture and rubber to a grey colour. Retail Price: 61.99 You Save: 16.00 (26) Polish Gas Mask MP4 With Filter And Transport Bag The Polish MP4 Bulldog Gas Mask was one of many Eastern European clones of the US M17 gas mask and was issued to the Polish People's Army. Most notable differences are lenses, they are slightly farther apart, the frames and voice diaphragm being a silver colour, as well as the 'nose', which is slightly less pronounced. The MP-4 only had minor changes to its American counterpart. The MP-4 would start to see much heavier use in the 1980s and early 1990s until it was mostly phased out by the MP-5. Masks were issued to all branches of forces of the Polish People's Army, but never actually saw as much use as planned, the SzM-41M and SzM-41M KF masks would continue to see heavy use. The design was finalised in 1973 and production began the same year. They are also known examples with rubber straps similar to these from the first prototype series. In years 1971-1972 there was model known as the OM-MG-2, and it was near identical to a final MP-4, except for it having black eye lens frames and voice emitter. Today only two existing pieces are known. Probably no more than a few hundred pieces have been produced. Every one of them has many small "checkmark" shape embossings to correct seal. The rubber straps were made from the same type of rubber as mask itself. They were made of dark brown rubber with dark coloured eye lens frames and voice emitter. The first known prototype models were made in 1970. The Polish MP-4 is an unlicensed clone of the US M17 gas mask series.
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