Okay, am I just supposed to go to Hoover Dam or does someone give me a quest for it? I just helped NCR at Forlorn Hope take Nelson but the Major didnt give me any other missions.

Also, Ive checked pretty much every location people mentioned to find the NCR Ranger armor with the red eyes (not the armor you see most rangers in, the armor thats in the intro with the sniper and the cover of the game) but I never see them. They arent at Delta , they aren't patrolling Camp Golf at night and they arent at Forlorn Hope, do I have to do more quests for the NCR to be able to see them? Im lvl 19 now

You gotta kill a ranger yourself for the armor. Thats the only way. They spawn at level 14+

If you help out the NCR ambassador living on the Strip he'll eventually send you to Hoover Dam for additional quests. I haven't seen the Veteran Rangers yet so I don't know what will cause them to show up - perhaps I need to be a high level or I need to be further along the NCR/Main quest lines.

Errrr, dude... Im not asking how to get the armor im asking where the heck these rangers are? All I ever see is the rangers with the khaki armor that looks like combat armor. Im looking for the armor with the helmet that has the red eyes, the armor the guy is wearing on the cover of the game.

Dude, the armor just starts showing up on Rangers after level 14. I hadn't seen until one last night myself and I'm level 19. I went to Quarry Junction to kill some Deathclaws and when I arrived 3 Rangers were fighting with them. One had the armor on. They all got killed so it was there to loot off him. I didn't use it because my current armor offers the same protection for less weight (I just repaired my armor with it) but I did take his Brush Gun

EDIT: Oh, and the wiki says it won't show up on anyone, no matter your level, until you do at least one main quest for a faction after you get to NV and have to start making some choices.

Hrm, well okay thanks.