Yes but none of them was a fallout-style reward like the tesla cannon, the winterized t-51b power armor, and lots of other stuff... if you like that great but it wasn't enough for me and many of us haha
Define "Fallout Style"
Do you mean "super powerful" like the Tesla Cannon and the Never-Degrading T-51b? Or the stealth suit that allows you to sneak through the entire game?
Those are all in the game anyway, although they've been rebalanced to not be so powerful.
But the BAR is pretty powerful- it's the only Full Auto .308 rifle. Feed it Jacketed Soft Points and it will wreck anything that gets within medium range of you. Using it sparingly at long range works too.
It's an all around great weapon but it doesn't break the game by making you unstoppable while wearing it. I was fine with such items in Fallout 3 since I didn't take it very seriously. But Fallout New Vegas definitely aspires to be a more serious "Fallout Game", so I don't think such things are appropriate unless you have Wild Wasteland.
If you're looking for such things just get yourself the Alien Blaster.
Perhaps you mean "high tech"? If so I would disagree that such things are "Fallout Style" on principle, as Fallout has always had a mix of high and low tech.
So the automatic rifle is just as "fallout" as your Tesla Cannon, in my opinion. And Did you forget the Holorifle? With all the mods its damage rivals the Gauss Rifles. And while not as powerful per shot as the Gauss weapons, it has advantages- namely, it uses 1 mf cell per shot, as opposed to the gauss rifle which uses 5, and it also can fire four times before reloading.
Again, it's not overpowered, but it's got its uses! Like I said, what do you people want, a giant power armor that causes you to take zero damage and a shotgun which fires independently guided heat seeking pellets that find your enemies and kill them instantly whether you aimed at them or not?
Seriously,
what does it take to please you people?