So, I recently bought a Russian GP-5 gas mask to use as full face protection during airsoft and look cool at the same time. But, I've read that outdated gas masks can become deadly after 5 years (this one was made in the mid 80's). I've also read that the GP-5's filter can only become deadly if there is a tear in the cotton filter, because there is charcoal inside the filter.
Which one is true?