I wouldn't change a thing on that rig - VERY freaking cool!!!!
I like the rifle a lot. Very nicely done.
However, I would put a lighter, short to mid range scope on it with a wider FOV and get that Swaro the heck off of it. It is out of place on such a rifle IMO(even though it looks real nice).
I'd throw a VX3 1.5-5x20 or the like on it......