The person manning MG3 in B412 in the pic is wearing high altitude/snow googles, and not aerial gunner's helmet which has integral transparent and tinted visors which flips down. The advantage of wearing helmet is obvious, and visors provide wide field of view in comparison to googles which have very limited field of view, restriced only to front. See the pictures of USA aerial gunners in the same website, in Iraq, and one of my brother refer to one of the gunner as alien, as he was also having his face covered by black cover.
2ndly, aerial gunners should also wear characteristic green nomex flight suits instead of donning standard army uniform. Flight suits are made to aviator's mil spec, they are fire retardent (not to confuse with fire resistant) .
The title page Cobra taking off from Multan is assumed to be having no ammo on board, so you may notice that its exhaust Infra red suppressor is mounted. But in the second page, a cobra is landing in FOB, with visible TOW installed, bit you notice the IR suppressor exhaust is missing, means it is removed to lighten the helo, but it is not a good practice, when operating in Taliban area, known to have SAMs.