If memory serves, the Vbob frame and Cbob frame are slightly different dimensionally.
Most massed produced bobtail grips will work on either frame just fine. Sarges grips are different because he makes a fuller grip. This means less of the frame showing behind the panels. His grips are made to fit the whole frame. Since there is a difference between the two, when ordering from Sarge, you need to specify V or C bob.
Example - Sarges Box Elder Burl on my Rogers Precision SA Mil-Spec.
Ryan