So this is info and a few questions I have regarding threading a barrel (specifically to install a suppressor on it), please correct me if any of my understanding is incorrect: 1. Suppressor threads are somewhat "standard" (a known set of possibilities). 2. A gunsmith should be able to thread a barrel given the thread size without having to have the actual suppressor, e.g. I see 1/2-28 mentioned quite a bit. 3. Is it a fairly easy job to thread a barrel? prices I've seen seemed to be in the $100 range, is that true? 4. What about thread protectors? I've seen some places sell them but they don't seem to be as common, can a gunsmith make a custom thread protector? 5. I also imagine a gunsmith will not/need not mess up with the rifling while threading a barrel. Also if you guys have any recommendations for gunsmiths that would thread a rifle/handgun barrel around Portland Metro, that would be great. I am willing to pay a little extra for quality and meticulous work.