We always look forward to the custom work by Nextgen Retros as he does conversion of Tokyo Marui MWS and NGRS airsoft rifles, giving them a retro like. This custom Tokyo Marui Colt M16A3 MWS GBB Rifle uses asSteel Outer Barrel made for the Western Arms System with an WA to MWS System Outer Barrel Adapter from G&P. Other parts used are a G&P M16A2 MWS Stock and carry handle.