The image above shows a Jasic water-cooled MIG gun.
Swan Neck
Insulating Washer
Diffuser
Tip Adaptor
Nozzle/Shroud
Contact Tip
Liner
Switch/Handle/Cable Support
Cable Assembley
Water Inlet Hose
Water Outlet Hose
Water Hose Nipple
Euro Connection Kit
Gun Plug 'O' Ring
Liner Retaining Nut