da Vinci Airsoft have some more new inner barrels on their website:
da VInci airsoft has added New inner barrel for Tokyo Marui M4A1 MWS.
Brand : 01 Raizen
Material : Stainless steel 304
Inner Diameter : 6.01mm
Length : 250mm
Many airsoft players requested me to release MWS inner barrel.da Vinci Airsoft
This will be improved FPS !