Nerf Caliburn - Rmax Barrel Shroud

This is a cosmetic add-on for this file set: https://www.thingiverse.com/thing:2722395

CHANGE NOTE - 05/04/18 - Added Full-Length rail segment option. Print in four parts and pin/glue together before screwing them onto the shroud segments.
Also updated shroud parts to improve fit into the railgasm segments. Fixed side hole sizes, and added holes for pins to all the segments to be pinned/glued together.

CHANGE NOTE - 04/22/18 - This part set now nest inbetween the segments of the "Railgasm