TM G18C loading nozzles you might want to try:
1. AABB Enhanced Nozzle Set for Marui G18C GBB
http://shop.ehobbyasia.com/aabb-enha...l#.Ust1wfRDt-A
2. PRO&T Loading Muzzle for Marui G18C GBB
http://shop.ehobbyasia.com/proandt-l...l#.Ust10vRDt-A
3. FE Glock Enhanced Loading Nozzle for Marui/AMRY/MEISTER/CA GBB
http://shop.ehobbyasia.com/fe-glock-...l#.Ust2EPRDt-A
4. Stark Arms Original Parts - Loading Nozzle for S18C
http://www.wgcshop.com/wgc2008/main/...&view_choice=c
5. AIP Reinforced Loading Nozzle For Marui G17/ G18C GBB
http://www.airsoftglobal.com/shop/in...ducts_id=16681