I was actually talking about the older AUGs - I have a USR which is effectively an A2, albeit with a girly grey thumbhole stock, and the safety key is identical to the scope adjustment tool.
The USR, IMHO is the best deal in the AUG family - you can find one brand new (or like new) for waaaay less than a standard AUG, and you get all of the plusses of the A2 version (roller bolt, folding handle, removable optics, upgraded firing pin), and the only shortcoming is the stock, the flashhider, and the fact that you have to install your own quick release button. None of those shortcomings was a deal-breaker for me, and honestly, the USR with a 16" barrel is shorter than the AUG due to the lack of a flash suppressor. If you are a shooter vs a collector and you want an AUG, the USR is a great choice.
-Raj