Nothing really, used regulators to sub as a foregrip.
Marker Setup:
Karta XValve Mag
Strengths:
Lightweight, some parts can be anodized to match your marker, easy to install.
Weaknesses:
Nothing really.
Review:
I picked this up for my mag at the recommendation of a fellow mag-nut. My Deadly Wind Karta-bodied mag really needed a foregrip besided the reg I was temporarily using.
The grip came fairly fast considering the holidays, it didn't come with instructions, but taking ten seconds to think about it, anyone who can take the body off their mag can put this on.
Thus far I have enjoyed the feel and look of my DW grip. I haven't found anything negative yet.