How to grab object with TWO hands

Using the Oculus Integration package in Unity, I'm trying to figure out how to grab a gun with TWO hands, where one hand grabs the barrel and the other grabs the handle.  I want when I move the handle, the barrel hand stays attached, but the gun itself adjusts accordingly. 

I'm a bit new to vr / unity development, and I can't find a thing that supports "two handed" grips with the Oculus Integration package.  Can anybody point me in the right direction?

Thanks in advance.