- Fully Licensed by UMAREX & GLOCK INC - Patterned after the Gen 5 MOS Pistol - Aluminum Slide - Licensed Glock Markings - Steel Hammer Parts - Includes 4 types of MOS Optics Plate ( RMR, Doctor, C-More, Leupold Spec. ) - Comes with 18 Round Gas Magazine - Magazine Compatible with Umarex Glock 17 Magazine VFC System