OK kids, here's the deal. I haven't read all this and I'm just here telling you how it is.
I'm going to tell you the high level history here, but I'm not going to engage people trying to split hairs because you read something on the internet that one time.
The ATF considered rubber wipes as usable items as declared in an opinion letter which stated that because it was a wear item, that users could replace them themselves (I'm not going to argue or engage mental gymnastics about them being suppressor parts but still providing this opinion back then). We know to never trust ATF opinions. And as per their usual fashion, they came out with a NEW opinion that said they do indeed count these as suppressor parts and that MANUFACTURERS can't sell extra--just like they can't sell extra suppressor baffles. Thank you to the suppressor company that was butt-hurt that we were selling them and asked the ATF to give an opinion. You know who you are.
So, to remain compliant with the new interpretation of the regs we ceased selling them as accessory items. The ATF has never said that YOU as the end user can't replace them. And before anyone here or someone that may still be affiliated with a mostly defunct company decides to ask the ATF for further clarification--just don't.
Those that try and extend the ATF's logic of these being suppressor parts and thus, the end user is making suppressor parts and that they're illegal, need to just chill out. That's not what was declared by the ATF and what they care about. Ya'll can go to Ace hardware and buy a 1" OD, 1/8" thick, neoprene faucet washer and nobody needs to be telling anyone how to live their life.
We'll continue to ship one in each suppressor which is absolutely allowed. If you buy a wipe cap as an accessory like the OP did, you'll notice that it's not included. In the meantime, my recommendation is that you don't walk around with wipes falling out of your pockets in front of an ATF agent. This isn't legal advice. And call your mom. She misses you.
I hope that helps! (and congrats Steel+Killer on your new suppressor)
Todd Magee
Dead Air Engineering