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Good morning Tuan, you are an excellent reporter, but you seem to be a bit preoccupied with firearms, . During WW-II many pistols were made from pipe, bamboo etc. It is 'impossible' to keep a firearm away from those that would use it illegally. In the case of an all glass / ceramic firearm, you would still have a very formidable task of developing all glass ammunition.
Posted by Don Jose de La Mancha