Is the entire device regulated or is it like an AR where only 1 part is regulated? If so, what is that part? I'm considering a suppressor again and would like to get one that would work on a .22 and a .223(I believe this is possible, also wanted to confirm it) but I don't want that extra weight on the end of the .22. My theory was if I got a .223 suppressor I could potentially swap out the guts for a lighter .22 version. I wasn't sure if that would be legal/safe/possible. Then I got to thinking, can I buy one suppressor and have it work on many calibers by swapping out the guts? Would a suppressor tube large enough to work on a .45 be small enough to still allow a sight picture on a .22? I'm just thinking out loud here, anyone have any thoughts or input on this?