2010-08-04 M4A1 Carbine(Silver Series) Copper Barrel (363mm) Copper Cylinder (for 200mm - 400mm) Air Nozzle (for M4)without O'ring Steel Gear Set Piston (Full Teeth)----------- CPP01 POM Cylinder Head V.II Aluminium Piston Head Metal Spring ... Copyright@2008 Fung Li Creative International Limited – All Rights Reserved POWERED BY SMART-INFO LIMITED