If the 50 cal is true. I suspect they will give him one chance to surrender, then burn him out one way or another. It’s hard to believe he could get a big gun like that out a window and set up before taking fire.
If he’s holed up in the cabin, a couple of well-placed rifle grenades will take care of the problem.
We are under the assumption because of reports here that the media press is not up-to-date whereby he has given the police the slip. Dorner is on the run again.