Guns Modify EVO Drop In Lower Full Steel Parts Set w GEI Style Trigger for Tokyo Marui GM M4 MWS Zinc Box V2 flash hider The top is made of 14:350850#CP 2 hook The top is made of a high tensile strength nylon cord The Unicorn stainless steel drop in trigger box and reinforced nozzle set boost durability and cycling performance under heavy use GEI style trigger provides a refined pull and enhanced trigger response for improved control With the combination of solid construction enhanced trigger design and proven compatibility the Guns Modify EVO Drop In Lower Full Steel Parts Set stands out as one of the most complete and durable internal upgrades available for the MWS platform