I like my foregrip mounted half way between the end of the A5 body and the barrel. Right overtop the little nub that sticks down at the end of the body where the barrel is attached.

I just finished a custom foregrip that sits perfectly, right there, half way between the body and barrel. I never liked the position of the stock foregrip or the fact that I had to have my hand vertical. Makes it a pain in the butt for crawling around so I sculpted and cast a new one. (which I'll post on soon.) ~Frosty.