The sentence that starts with "For example," on the second to last paragraph on page 2 spells it out very specifically. It also says the exact same thing in 18 USC. This is not "our" interpretation, as I said in the other thread, we also got consultation from one of the leading NFA law firms in the country before any of these products was announced publicly.
I know other people sell endcaps separately. It is beyond frustrating from our perspective, believe me. We want to be making great cans and giving great service 10, 20, 30+ years from now and we can't do that if we're shut down due to violations. Let's hope this administration can make some concrete progress deregulating suppressors.
As for the warranty-- it wouldn't, why would it? We don't "automatically" void warranties for using third party mounts. Just don't use a product that is poorly designed and causes damage or causes problems, that's on them/you.