Man usually it is a simple fix that a gunsmith could do by opening up the trigger area to allow for the hanger clearance. I’m not 100% on what the krg needs but I know someone that has put an Impact in one so I know that it can be done. A lot of times it is something that could be done with a dremel as well, as long as your not taking too much out.Thanks. Been looking at the MPA; have never run a chassis before so it’ll be an adjustment.