Limited lifetime if I remember correctly. From what I've been able to gather, they typically just replace the scope if you have a problem. That, in any case, is what they did when I had a problem with a TRS 1.
everything millett i have had was replaced with no questions. my first trs-1 didnt meet elevation claims so they replaced it, with a mil/mil version. it was mil/moa. i also bought a used DMS 1-4x from a member here with a stiff zoom ring. i sent it in and they sent me a new one. no issues
A friend of mine has two and recently had to send one back. It took a month but they sent him a new one back. That was pretty good on their part but my concern would be that he has purchased two of them in the 2.5 yrs and both have had to go back with issues. Might be better options out there for that price range or slightly more if you do a little homework.
Just had a buddy of mine who owns two have one go out on him during training for the sheriffs department. The internals quit tracking. I have heard their warranty program is good but I would have a hard time putting it back in that line of work.