I am new to the suppressor game. I am looking into getting a suppressor for a Landtec .308. The rifle will be used in law enforcement. The barrel is going to be cut down and threaded. I want zero shift in impact, if I have to remove the suppressor (which one thread stated was a good idea). I understand suppressed zero and un-suppressed zero will be different. But if I have a suppressed zero and have to take the suppressor off, when I put if back on I want it retain the suppressed zero. I was like something small in size and low in weight. Do I want thread on or quick detach? I am paying for this myself, so something like a Surefire is out of my reach right now (new baby). Any help is well wanted. Thanks