those pvs 7s will drown you if you ever tried to wade in them....walking in them is tough enough... you lose all depth perception and the resolution is terrible. The PVS-7B are still in service, but most soldiers and marines have much newer monacle style pvs 14's or dual tube pvs 15s. I can't believe the PVS 7s cost so much seein from personal use how terrible they are. Can only imagine what the better ones would run.