The set includes turned brass barrels.
Used on following USN battleships:
USS New Mexico (BB-40), USS Mississippi (BB-41), USS Idaho (BB-42)
USS Tennessee (BB-43), USS California (BB-44)
It is very simple to use in Your model, and makes it extremely realistic. Simply cut off the original plastic barrel and drill a hole in the remaining plastic parts and insert the metal barrel using Cyanoacrylate adhesives.
Version of gun for turrets without blastbags you can find in our set: SM-700-050.