I have been looking through most, (if not all), of the Praxis articles but haven't any mention about this, (I know it is terribly obscure but I tend to specialize in the obscure).
In none of the articles do I see any mention of personal protection equipment, (gas masks and such).
I know the need for a certain level of training and maintenance, (in a previous life I was training in their use), but has anyone even thought that they may be useful? (I have not seen any mentions on any of the equipment lists). I can think of at least a couple of scenarios where they would be. Smoke, Tear Gas, Binary agents, (You really think "they" won't use them? Think Seattle.)
Small units may not need them initially but I can see a situation where when push comes to shove the next thing after a flash bang is going to be a teargas canister. Hits are being taken? Drop smoke. Need to "clean out" a pesky group of holed up 3'pers? You get the picture. If the JBT's are training with them it seems a serious hole to ignore the possibility.
I have a USGI M40 mask (as above). It is perhaps not the best mask around, but I got a good deal on it back in the late 90s to replace an ageing M17A1. I like it because it has spin-on external NATO-standard filters, which is certainly a step up from the internal cheek-type filters of the M17 series. I inspected it the other day and the rubber is still good, the NBC-environment drinking tube is still serviceable and it has the internal-framed prescription lenses in it. I bought up-to-date filters for it a year ago (again, another deal) but the old ones, still in the cans, will be serviceable for a while.
I bought Israeli civilian masks for my family back in the 90s, but need to update them.
I must confess that I am not going to get into MOPP gear, expecting that the more likely threat I will face is CS or other riot control gases. I realise that there are other non-lethal gases available to the Feds these days, but if it gets that far, I will endeavor to make their use superfluous.
However, I would appreciate it if some other Three Percenters would use this opportunity to contribute to the general knowledge base of the Sipsey Street Irregulars by detailing what experience they have had with gas masks.