MDT Vertical Grip on an MPA Chassis

That looks like a sweet grip. I have the mpa but have big hands. I did see a new Ergo vertical grip that looked pretty sweet. But doesn’t adjust and looks more for a tactical carbine???
Glad I read your post I think I found my next grip.
 
I tried the MDT on my MPA. It felt okay, but the grip just didn't seem to fit very well to the rifle. I have small hands, like size small in gloves. My complaint on the MPA grip was the index finger bump.

So I took my MPA to work, took off the grip tape and went to town with a roll of 220 sandpaper and a small grinder. It's injected molded, so there is a lot you can take off anywhere you want really. I smoothed out all the sharp angles, and now my finger reaches the trigger a lot more comfortably. Even took material of the back so if I want to wrap my thumb around instead of resting it on the shelf it's more comfortable.

So if you haven't tried sanding on it, I suggest giving it a shot. Start with 80/120 and end with wet 220.