Still would have to be welded or soldered, or you might create a suppressor launcher.
Impossible to happen ! Actually if you read it properly there would be a shoulder on the barrel for the added piece, because a barrel is tapered. Kind of hard and costly to put a taper on the inside of the round stock needed for the barrel. Also when heated the added piece would expand making it larger, slide on a cooler barrel and cool it could never ever come off, then screw on the suppressor or cap. It's never going to come off, barrel and added piece would heat up from shooting at the same rate and cool.
Secondly how in the hell would a threaded suppressor or muzzle brake launch off a rifle, that has a cap, brake or suppressor mounted. There is a shoulder for the added piece on the barrel as a stop. I would have no problem shooting with the added piece that had .001" of slop to get on and not be soldered.
