This holsters was created by Russian Company Stich Profi. They created it after request of Russian Special Force, who needed durable, cheap and of course comfort holster for NATO Pistol. This is especially important for "Vympel" and "SSO" units ;)
All of this holster made from Durable Plastic and that holding the gun is due to the design of the holster for the trigger bracket of the gun.
Stich Profi

The company specializes in the manufacture of equipment of leather, synthetic and other materials for hunters, sportsmen and law enforcement agencies. More than 23 years they work not only on the quality of the products, but also to modify it according to the wishes you buyers. They are developing new types of models as much as possible taking into account the specific features of the operation. To do this, they work closely with professional experts and consumers operational, hunting and other ammunition.
Among their customers, we are pleased to note such organizations as the Russian President's Security Service, the FSB, the Interior Ministry.