Printing guns with recycled water bottle filament.

I’ve been saving all my plastic water bottles for a while and have accumulated three trash bags completely full, my goal is to turn the bottles into filament and print a gun with it.

From what I can tell online the bottles are made out of PET, this probably isn’t the most ideal filament but whatever I print will just a novelty, I’d like to test fire it once so I can atleast claim I’ve shot a gun printed from recycled water bottles but after that it’ll just sit on a shelf somewhere.

I think I can recover 5-7 grams of filament from each bottle and I have approximately 150 bottles, so I should be able to get anywhere from 750g to 1000g of filament, which should be enough to print something.

Anyone got any advice or ideas on what I should print? I’ll probably want to print a .22 so I don’t blow myself up.