Remixed Caliburn Solid Stock (with notch for top hex nut)

This is a very quick remix of the standard solid Caliburn butt stock by Kuryaka -- it was missing a notch for the top hex nut to sit, so I've added that in. The model is otherwise unchanged.

This is offered in the standard 1-piece configuration, or in 2-pieces (with separate lower and upper parts) in case you want to colour-coordinate your buttstock.