Cyma cm.121 Threaded Barrel / Silencer Adapter
thingiverse
This is a small peice i found online but didn't really want to pay for lolhttps://www.begadi.com/begadi-cm-121-aep-silencer-adapter-schwarz.html?___store=en&___from_store=enit has a ~12mm thread that might not be perfect, but it fits mine well.Happy Printing!
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