it could be used for a gun manufacture for info purpose, or a local gun reseller, a club, an general information website (e.g. Heckler & Koch MP5 reviews, etc), or even used by US army (joking)
don't you think?
(2 690 000 result on google, Submachine gun is on wikpedia, etc)
"Switzerland allows the private ownership of semi-automatic versions of submachine .... Many other countries such as Germany, Austria and Italy authorize the private ownership of semi-automatic versions of submachine guns as sporting firearms"