HMMWV Turret info

I am in need of the dimension of the turret mounting on a HMMWV. Can anyone lead me in the right direction as far as a mil-spec or pub. I am working on a special mount but need the turret information as well as how much room is inside under the turret for my system design. Thanks

Mike

Call AMG.

Thank you,
I e-mailed them and called (sent to voice message). I guess its just a waiting game now. I tried to get some informaion from them last year a few times and they never did reply. I guess I don't rate high enough. We'll see.