There is a helipcopter crash on Sahkal located at coordinates 7470.00, 8468.44 that is spawning Tier 4/Bunker loot. During recient visits to this crash site I have found 2X NVGs and a AKM. Before that I found another AKM and plate carrier vest. This loot seems to be out of place as this area of the map is designated as Tier 2.
Make your way to the helicopter crash in the woods at coordinates: 7470.00, 8468.44 and pickup some really good loot. Log out and come back and get yourself some more really good loot.
I have showed up before and found nothing but regular loot. I believe this is because another player beat me to the loot.
According to the files as they are now, this is the correct current behaviour. That wreck and the loot you found is currently setup to potentially spawn any weapon that doesn't have tiers assigned.