One problem with importing a replica of the MP 40 is that it has a very long tubular receiver and a short barrel. The gun pictured in the photos is actually classified as a short barreled rifle (SBR) but is quite a long weapon. ATI has two options to address this, either they shorten the receiver and increase barrel length or permanently attach a faux suppressor. They are thinking that the latter option is more likely and plan on building authentic faux replica's of German WWII suppressors.