Got my GP-7 finally,pretty sure it sat in a warehouse all its life. The filter isn't threaded but it attaches to this plastic adapter that came with it, is this a fake
GP-7 Gas Mask Filter | Soviet Russian Army
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Vintage black gas mask GP-7 gas mask with filter 40mm GP-7 gas mask costume - Etsy 日本
I bought this GP7 for ~25€ : r/gasmasks
Got my GP-7 finally,pretty sure it sat in a warehouse all its life. The filter isn't threaded but it attaches to this plastic adapter that came with it, is this a fake