If you have been looking for a suppressor for M4s made of Duralumin, PDI Japan now have their Ryder.22 Suppressor available. This can fit most M4 AEGs, the KAC PDW AEG, and Tokyo Marui MP7 SMG AEG. For the TM MP7, you will need to find an adapter for a 14mm CCW thread for it to fit properly. Price is JPY6,860.00 or USD$86 at exchange rates as of this writing.