Jeff has one of those Ordnance Research tripods.
They are sturdy and heavy, and I am a fan of it.
However, not steady enough as they stand to handle the recoil of a .50 BMG semi-auto.
It wants to tip back when firing 50, even in semi-auto.
That tripod needs to be chained down to stakes or have weight added on the legs (sandbags?)
I think the purpose was more about the .30 caliber Brownings and other rifle calibre MG's.
The US M2 tripod is also not designed to handle the recoil forces of the 50 BMG, its too much gun for it.
An M3 tripod would be a closer fit for a Dshk, but you have to sit on the ground while firing.
You may want to call Ohio Ordnance or Ordnance Research and ask if they make a ground mount solution for the Dshk, as many as the US DoD has fielded to "Allies" I bet they have something they build for that gun.