That is much more practical actually it will stop most bullets actually as long as your not to close or large caliber or rifle so to speak. This is a fact so on lol
Not sure how he will do for the metal detector though but maybe just put in a bag so on carry it on though it is actually valuable so on
Takes time to make that kinda thing is all at lest 150 but more so on likely so on is the thing so like 500 maybe