well i saw this in another game or mod (dont remember witch one) it pretty much just makes you able to hit your e(use) key and fall over and fake being dead this would be good on all maps when your being shot at and ppl think they killed you and stop shooting so you stand up and kill them it would also be good when your going for stealth for hideing
pros
-stealth
-helps you live
cons
-cant shoot while in use
it would cost 2 credits and have 100 ammo or would be sold as feign death armor
TELL ME WHAT YOU THINK