I'm reporting you.I have usually been able to find non threaded crowned barrels for my builds. Sometimes it may take looking back at a website a few times to see if they get a batch of non threaded barrels in. Bulletguy Eddie used to carry 16" non threaded barrels and that's where I got some from. On the few barrels I bought with threads, I used red Loctite on the thread cap. I figure as long as the cap wont come off by hand or needs heat and a wrench, it will pass as permanent. Besides, I live in super communist lower Westchester County and never heard of anyone getting in trouble over a thread cap. I really don't think local law enforcement cares too much about thread caps on law abiding citizens rifles. Although the state police may be another story.