This is interesting. I'm not an expert, but aside from length and # of chambers how is the SIG "break" different from any other multi chamber muzzle break?

This is whatnots wrong with making determinations based in what could happen vs what is happening. Does that device reduce the sound signature of the weapon or not is all that should matter. Whether someone could easily machine a tube or duct tape a paper towel tube over it is irrelevant.

Hope Sig has good fortune.