So, riddle me this. As indicated previously, the OPs T3X Lite could achieve a 5/8-24" thread at 21" with just a tiny amount of what could be called shoulder, but let's say it's just threads on the barrel terminating (on the end toward the receiver, no 0.050" shoulder.... If screwed on snug, righty tighty, (LOL) AND of course if and only if alignment is good to avoid any strike, what's the problem? The end of the barrel threads are inside the can's threads, the extra threads inside the can are just there per usual, and the crown is not touched, again per usual. What's the perceived problem?
Good grief man. If it doesn't have a shoulder, what is it tightening against? Do you have any concept of tolerance in threaded applications?
Instead of making up your own ideas, take some time to actually learn this stuff. There's a whole industry involved in suppressors and suppressor mounting, and lots of well established principles and knowledge that are freely available if you're willing to learn.
