New steel gears, 6mm oily steel bushing gear box. High torque motor. Easy to disassemble metal body with gun logo (laser Armalite) and serial number, and a hi-cap mag (300rd). Reinforced slip ring. Nylon and glass fiber hand grip, and hand guard. Metallic hop-up chamber and new hop-up rubber. And metallic R.I.S. one piece outer barrel.