[Bill]

I got a Jeep mount for my 1919 Browning is there a part you can get to lock it in place while driving?

 

[dragoon11]

This is what you need.

 

[Griffinroydonald]

Cradle

Some people use the top cradle from a 1917A1 Browning Tripod. This one will lock the gun in about any position.