Gas Mask Filter Problems Solved.

[Frontier Firearms]

With the high demand for gas masks over the past 3 years, available availability of good quality filters (and ones that actually fit) has been a challenge. The two most common filter sizes are 40mm & 60mm.

Generally the 40mm thread is the most common size on gas masks (Canadian, Russian & Czech & British), however the filters for the 40mm masks, are rare, and can be very expensive. This summer we were able to get our hands on a good supply of Finnish 60mm Filters, so we started to dream up ways to make them comparable.

Gun sales were crazy and we had to shelve the idea until we had more time. Now with more time on our hands we been able to put together a 3D printed solution for those who have 40mm gas masks but cannot find a supply of filters.


Simple 60mm Threaded female End to a 40mm Male End


All there is to it!



Here is a few options that we are now offering.








If you currently have a 40mm Gas Mas, we are also offering a 5 Pack of Finish Filters with 1 Adaptor for $89.95.





Also compatible with Czech and Canadian Military 40mm Gas masks.

[Frontier Firearms]

Allot of these have sold out or are nearly sold out. We will have more available in the Larger Russian Gas masks Nov 3rd to pre-order. They are $10 more but will now come with the carry bag and be available in grey.

[Ozzi]

What's the expiration date on the filters?

[Frontier Firearms]

What's the expiration date on the filters?

No Exp date is listed on the filter itself.

[Ditchdoc]

What, specifically, do these filter? NBCW? Or something you might use for painting? Also, just how good a seal do you get with a 3d printed fix. Filter is pointless if air gets in around it.

[Battlerifleelitist]

Hmm will this pass muster for sealing? Does it have a o-ring or is the thread tapered like pipe thread?

I don't mean to be rude but this might just be decorative, even more than using old possibly non-sealing gas masks (but are still marked more than strictly decorative).

[koopa1333]

All of the potential problems as mentioned above are a bit worrisome, but furthermore, 40mm GOST and 40mm NATO are two different thread pitches. I have a hard time believing it actually forms an airtight seal on both types of masks. Also 60mm filters contain all sorts of nasty stuff ranging from asbestos to chromium. Just pony up the extra money folks and get a good mask and good filters. Frontier has some great offerings

[Chumlee Bumsnag]

That adapter is pretty cool. Well done.

[ROBPECKFORD]

Are Theese for preppers? Or military training? Just wondering...

[Jeanmat]

Alright so what kind of testing have you done? Have you actually tested for proper seal using banana essence (CIA method) or anything similar? Considering the nature of the product, I hope you've actually tested them to the best of your ability. Furthermore, where's the spec sheet? What is it rated for? What's it's construction even? There's not much info out there. HEPA filter and charcoal or just charcoal?