That Jeep came with a ,50cal. The post was the same for the .30 and the .50 in the real WW2 Jeeps. The cradle holding the gun was different. Many pictures are around of the 1917 cradle designed for the water cooled .30, which would also fit the air cooled .30. Then a lighter cradle for a .30 air cooled only and then a bigger one with ammo can tray for the .50.
There were more than a dozen cradles for everything, mostly ending the war with a combination cradle that would hold either the .30 or .50.
The only exception was the monster water cooled .50. It was so heavy it wasn't mounted on a Jeep and the post was a heavy solid steel triangle shaped affair suitable for mounting in ground or shipboard AA positions or on a big truck.
MV magazine has a few articles with pictures of all these mounts in the past few years, reprints of the old Army manuals. The pictures do not have dimensions. You'd do better looking for a MVPA show near you and take your own dimensions. MV 1/1 guys, like me, have had guys ask me to let them crawl over my precious trucks for detail pictures. We're used to it.
TTT
