Check out these new upgrade parts released by UAC for the Tokyo Marui M4A1 MWS Gas Blowback Rifle... "UAC has been keep developing new and innovation products and we are now one step ahead to develop parts for Tokyo Marui M4A1 MWS. Tokyo Marui M4A1 MWS GBB as known in good quality and high performance, it is widely used by competition shooters and popular to wargame players. However, shooters and players are concerning of breaking the stock nozzle without a replacement can be found in the market. UAC is first in the market to develop the reinforced nozzle and enhanced sealing buffer for Tokyo Marui M4A1 MWS GBB and there is more upgrade parts coming soon."