-Aj- wrote: PETG is a bad springer barrel material for informers foam, air gun ONLY. 17/32 brass is ok. Conduit (16mm) is the best so far, it's ID is the same as CPVC, I have some from America, they are virtually the same in ID and OD dimensions.
I'd like to contradict that statement. From my experiences the blue foam works very nicely in the PETG. It provides a very 'firm' fit and is perfect. It just depends how much you've air hot air dryer gun it. His PETG works really well in his old black FBR. But that's my experiences. Your's might be different Aj.