On the pic I posted? It's the AT LE model, which comes with the AX buttstock out of the box. Mile High will do the conversion for you (or you can swap the buttstock yourself) for ~$800. If you get a 308 barrel chopped down to 16" it will basically be the AT LE for civilians.check out the buttstock on the AT below.....
Not sure how anyone will get the chassis on the AXMC LE though.