Great news. I was waiting for them to release the M model. I figured it was coming since some of the parts for it are in the J model kit. The box art is confusing though as it looks like a J model, not an M.
The M model has many improvements over the J model. These include a 6-blade main rotor system taken from the MD600 and a "cruciform" 4-blade tail rotor. It also has an all-new, digital "glass" IP. The rear cargo door has been significantly widened and reshaped. The upper vertical stabilizer has an add-on cowling making it notably wider and deeper. There are also aerodynamic cowlings over the landing skid legs. The overhead canopy windows are now darkly smoked (tinted) as well.
Here is an AH-6M.

You can see the wider/reshaped rear door on this MH-6M as well.
