The military gas mask in "Stalker 2: Heart of Chernobyl" is a very useful and powerful equipment in the game. If you want to get the military gas mask, you can first play the main line to the sphere and escape at the end. After exiting the sphere, you will encounter several enemies wearing gas masks.
How to get the Heart of Chernobyl gas mask in S.T.A.L.K.E.
As the main storyline progresses to the sphere and the final step of escaping from the sphere, it seems that there will be a steady stream of support from the base, and the support coming later will include enemies wearing gas masks, and they are also holding AKM-74s. It's easy to shoot with a gun in the building, but unfortunately the weight limit prevents you from taking back all the loot.
