Versions for 16mm (Conduit/Artifact barrel),14.5mm (PETG, Brass?), and 0.625in for 1/2in PVC. Print with a few perimeters and drill out to size if needed.
This is the shell I designed when I was working on my MTB UltraSledge build. Should work well enough for a normal modded Sledgefire, but you will probably need to tweak the barrel length from what is seen here!