Anyone know of an MPA style grip (thumb shelf) from AR

Do the MPA chassis not use an AR style grip tang? I was under the impression that the MPA grips were usable on ARs "with possible minor fitting required." I could be wrong.
 
Found it...

"The interface with the rifle is a standard A2 type, so the grip, with potential minor modifications, should fit onto other rifles, carbines and chassis that utilize an A2 Grip."