Fortification damage card of mechanic, does it apply to barriers?

Gears 5
#1

It shows a pic of a sentry so I’m not sure

#2

Yes

#3

Nice question I don’t know it is the same with Cole Trains damage Pekr (does it count for offense kills)

#4

The card and the perk both apply to barriers.

#5

It applies to All of the Fortifications including your Ultimate