The military bulletproof vest in "Stalker 2: Heart of Chernobyl" is a very useful and powerful equipment in the game. If you want to get the military bulletproof vest, you can first play the main line to the sphere and escape at the end. It seems that there will be a steady stream of support from the base for the steps out of the ball area.
How to get military armor in S.T.A.L.K.E.R. 2: Heart of Chernobyl
In the main storyline, when you progress to the ball area and finally escape from the ball area, it seems that there will be a steady stream of support from the base. Among the support coming later, there will be enemies wearing military bulletproof vests. You can kill them with a headshot. Military style bulletproof vests are available.
However, there are a lot of military bulletproof vests, so you may not be able to take them all away.
