Better for what? is the question at hand. The D2 is a great long range unit, but it is a heavy beast, right there with a VW beetle on the front of your rifle. I haven't played with the ATPIAL-c, but I have plenty of time on the restricted unit. If you open the flood all the way up, it gives you a good idea of the capabilities of the upcoming unit, from what I gather reading posts. Knowing that, I would think the ATPIAL-C would be a better carbine setup, and the D2 would make a better longer range setup. I'm sure the guys from TNVC will be along shortly to help out.