The NRS3 is the same frame except: it has rear Vbrake bosses, and the shock doesn't have rebound adjustment.
If you go to Giant for a frame only, the frame will come with Vbrake bosses usually. They have too have those also in that production run, since the replacement frames have to be able to warrenty swap with any model NRS that year.
If you go to Giant for a frame only, the frame will come with Vbrake bosses usually. They have too have those also in that production run, since the replacement frames have to be able to warrenty swap with any model NRS that year.