![]() ![]() They all seem to be vacuum sealed (not only the packaging, but the filters themselves) and have an impressive (suspicious?) 20-year shell life! I've found some, and they all seem to be coming from a single or multiple Czech producers under different brand names. Modern, western-made 40mm GOST compatible filters.It's not bad and readily available, but not really feasible without a gasmask satchel. Another known alternative is a chinese normalised thread hose that allows the use of 40mm NATO filters.Viable alternative but with uncertain availability. Sadly, they are not commercially available for individual clients from the producer even in Poland. But the high demand for them makes non-expired ones quite expensive and rare. Polish FP-5, normalised thread filters are a known alternative.Especially these microscopic unscrewable ones. Modern russian 40mm GOST filters - that would be a great alternative if they were readily available in the western hemisphere, but I wasnt able to find any shops shipping them here. ![]()
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