I think I follow, if I remove a section and the suppressor can still function the separate part becomes an item you cannot posses.
I definitely like Doubloon's solution and will go with that, it is simple and solves all the problems well enough, I will either end up with a longish suppressor if I mount it on a pistol, or I will make it shorter than the barrel extension, I do not want to go longer on the barrel as I want to stay subsonic (5" seems about right according to Ballistics By The Inch http://www.ballisticsbytheinch.com/
Depends on your location as to whether or not it becomes supersonic or not, I am in North Carolina and anything over 4.4" goes supersonic for me.
I'm guessing that the guys making can-less suppressors have to make sure they never assemble their suppressors minus a segment or legally they will have shortened their suppressor and would not ever be able to reassemble it with all of the sections, I assume destroying the extra section would have to be done right away as they would also then be in possession of illegal "spare parts". Maybe a bit extreme, but I believe in following all NFA laws to the letter, all the time.
Who makes a can-less suppressor?
Another bonus question....
Can you rearrange the order of parts within a suppressor? Say, put the spacers in a different order to tweak a design, assuming you always used the exact same parts, none left over, or added? Not something I plan on doing, just curious
Yes, there is nothing saying you can't reorganize the internal parts, so long as you have no extra parts after assembly.
Second extra bonus question....
Could you legally mount two whole suppressors in line? two suppressors, two tax stamps. If the front of one mounts to the rear of the other would it be manufacturing a third suppressor or would you merely be using two suppressors on one gun? just a thought exercise as the probability of a baffle strike seems rather high, and the idea seems kind of silly.
No you can not. ATF would say one of the 2 things which are both illegal.....
1 - It creates a new silencer meaning you have a third silencer that is not registered.
2 - It enhances the performance of the first silencer but using the second silencer and therefore treated as if you extended the silencer regardless you used another silencer to achieve that extension.