Mafioso CNC Aluminum  Robocop AUTO 9 Conversion Kit For KSC M93R System 7
 
Constructed via CNC, the frame and slide is made from aluminum. The outer barrel is also made from aluminum, creating a very robust kit. The grip however is made out of plastic. 

Mafioso Airsoft Conversion Kit includes:
Slide and Outer barrel.
Extended Robocop front.
Latches.
Grip.
Rear Sight.