[intinerious]

Originally Posted by ILLusion

I think it's more a case of pot metal just being very fragile and having very little tensile strength compared to higher end polymers out there... aircraft grade aluminum, on the other hand, is extremely rigid, but has a very high tensile breaking point compared to pot metal or even plastics. It is also more expensive to work with due to the hardness of it, as it has to be machined, rather than a single shot injection in to a die cast mould.

However, due to the very thing walls required to fit such a nozzle in to GBB, I can't see very many metals at all that can retain the strength and rigidity required for this application. Plastics would be a better option, whether it be glass filled nylon or Delrin. You are right about the flexion of Delrin. It's one of the selling qualities of the material, along with natural self-lubricating characteristics.

This case appeals more to basic metallurgy and materials science, with a hint of applied sciences.

Ahh I see!

Thanks for the info!