The 3rd Generation Glock 17 handgun used by Milo (and later found by Eggs) is not "made almost entirely of plastic, making it undetectable by metal detectors" as claimed. It does have a polymer frame, but the slide (top portion), barrel and internals are all made of metal that would be easily detected by a metal detector. Also, while considerably quieter, a suppressed 9mm handgun is still much louder than depicted in most movies to include this one.