I see Rusmilitary are listing the above CO2 smg . A CO2 version of the real steel 9mm firearm and comprising of 80% parts from the RS .
The CO2 gun is unlike anything else around - including the Drozd because it has a real working blowback action and is restricted to semi auto only .
See here :
http://www.rusmilitary.com/html/airpistol_kedr.htm
http://www.rusmilitary.com/images/kedr_co2.jpg
Quite potent too at 3 joules of power . Just one drawback - apart from no postal sales - £395 !!!
Want one !!
Carl.