I just stumbled across this and fell in love! great work. My favorite area is the foregrip, I think it looks perfect on this.
2 nitpicks:
The ejection port is kind of in a weird place. it's definitely doable, but might add a few extra moving parts that would increase required maintenance. That being said, I'm sure by 2032 this wouldn't be an issue.
My other concern is the butt stock, it seems to jut a bit abruptly. Normally this isn't a problem for me but the HVATR has such a smooth, ergonomic flow that its a bit of a shame to see something stick out of place like that.