It would be best to just call Marty at Badger Ordnance. He has done several inlets for stocks in the past including AX chassis originally designed for 700 inlets.
You could also message Massoud here on the hide, since he designed the KRG Whiskey, he would surely know.
Hello,
There's no reason to mill anything, we have a Badger 2008/13 LA chassis in early production that accepts CIP length AICS mags. If you'd like to pre-order you can send an email to [email protected]. Thank you,
Justin