SDK silenced rifle

The SDK appears to have been a bullpup design, with the bolt, breech, and magazine feed located in the stock of the weapon. The barrel ran along the entire length of the gun and was encased in a large integral suppressor. The SDK was outfitted with a scope and had a twin-trigger arrangement. The gun was fed by Luger magazines.
It was also reported that the SDK was chambered for soft-nosed, unmarked 9×19mm that were tipped with cyanide.
Number built: 2