This is the Reach version of the AR. This model was built off of my V2 assault rifle. So you could call this the assault rifle V2.5. Some of the differences are 1.) a less clean cut, military look as seen in reach (as to be expected) and 2.) a slightly modified rear-end, to give it a more clean cut apperance. Other than that, there isn't much to say. Enjoy the new rifle.