A low poly barrel (608 Vertices) with two procedural materials, each with a custom node group that you can tweak to your liking. A custom width parameter is in the Barrel material for you to adjust the width of the barrel.
 
Instructions:
 
Move the blend file to your asset directory. You should be able to drag and drop it into other blend files using the asset browser after this.
 
The License.
 
Terms And Conditions:
 
No refunds.
Abide by the license.
 
Support is available at this email: thomasmoore3d@gmail.com