sadly the problem is the "new" threaded barrel adapter.
have cleaned and lubed it all up (and the gun)
and the original barrel works fine.
i always did find it a strange fit when putting the inner barrel into it. it always felt stiff and like it didn't go as far as it should. annoying
G17 G18 GBB TDC outer barrel assembly TM, WE - Empire Airsoft LTD
this is the problem - even without any silencer / tracer