Production in Italy ceased in the year 1997, with the closure of SITES, but proceeded in very small numbers in Switzerland through Greco Sport S.A., a company founded by Gritti, until 2001.

This allows the shooter to safely carry a round in the chamber and fire immediately as the double-action trigger eliminates the need for cocking prior to shooting.

Versions of the SITES "Spectre" M4 submachine gun specifically made for the civilian market have been around since the middle 1980s and up to the late 1990s, their production suffering a major backlash when the US Federal Assault Weapons Ban prohibited the import and sale of them on the American market, the biggest and most lucrative for this kind of item.

The SITES "Ranger" sub-carbine, which was a distinctly Italian market gun, features the foregrip (which is removable), a longer barrel, and the top-folding stock is permanently locked into open position to comply with the requirements of the Italian laws about the minimum allowed length for civilian-legal long arms.

In the version of this carbine sold in Italy, the removal of the stock was made harder, requiring the use of tools, and proceeding to effectively shorten the weapon by this way could be prosecuted as a criminal offense.