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The standard X door was designed to stop a 17 grain projectile, aka shrapnel, at around 1200 or 1500 fps. The supplemental armored doors just add to its ability, non are NIJ rated against center fire cartridge ballistic threats, for that you need the FRAG doors etc.

Same as X door, but good luck finding any, street price is about 3500 dollars or more for a set of 4 these days.

I have three types of doors but prefer the X doors, the X Doors with Supplemental Armor are my favorite I have though which is an armored 2 piece skin over a Kevlar x door.