But with Heavy Mil-Spec locking in at merely 35,000 ¥ it suggests to be quite inexpensive, considering the fact that each armor has to be custom fit for ist wearer and can't be mass produced.
So with that price tag it's hard to explain that such tech isn't already in use for security vehicles.
Of course, vehicular armor is also a bit more "boom or bust" than the more ablative personal armor.
For instance, Hardened Armor with an AV of 15 vs a vehicle of Armor 15, giving both the armor's wearer and the vehicle a Body of 12, you'll find that the vehicular armor is generally better, as anything with a damage code of 15 or less pings off with no rolls required, while the Hardened Armor wearer can still be hurt by heavy pistols. Not *easily* mind you, but a damage code of 9 with -2 AP (A reasonable Predator with better ammo) can tink away. A stronger attack, such as a DV 12 with -3 AP, still dinks off the vehicle but is now starting to deal some damage to the armored guy.
The difference comes when you have something that can HURT the vehicle, like a DV 20 hit. Once you get past the vehicle's armor, you're doing enough that it probably flatlines.
(Which is why the older version of Hardened Armor for critters went away. It made big critters immune to everything, right up until something splattered them utterly. No nickle and dime shots there!)