NAVAL CANNON

Cast iron cannon supplied to warships and fortifications in the 18th century.
Modeling and texturing are all made with Lightwave. Due to different way to handling texture values, probably you have to correct texture settings when use the object with other software.

In the 18th century, cast iron smoothbore cannons became the primary heavy artillery supplied to warships and coastal fortifications. Due to advancements in metallurgy and manufacturing, cast iron largely replaced expensive bronze for maritime and static defense uses, allowing global powers to mass-produce powerful fleets and reinforce vast colonial frontiers.
Solid Casting and Boring: Earlier cannons were cast around a clay core, which often left dangerous, hidden air pockets. In the mid-to-late 18th century, foundries revolutionized production by casting the cannon as a solid block of iron and then mechanically boring out the barrel. This created a much stronger, structurally uniform weapon with a precise bore, drastically reducing the rate of catastrophic explosions (bursting).
Economic Advantage: Iron guns were far cheaper than bronze equivalents. While a worn-out iron cannon had little scrap value compared to bronze (which could be melted down and recast easily), the sheer economics allowed navies like Great Britain's Royal Navy to fully arm massive fleets of ships of the line.

Cannons were categorized by the weight of the solid iron round shot they fired. Warships and heavy fortifications shared the same heavy calibers, though their mountings differed:
Heavy Guns (32-pounders and 24-pounders): Found on the lower gun decks of major warships (ships of the line) and key bastions of coastal fortresses. They were structural ship-smashers capable of breaching thick oak hulls or leveling stone parapets.
Medium Guns (18-pounders and 12-pounders): Utilized on upper decks, frigates, and secondary fort batteries.
Light Guns (9-pounders, 6-pounders, and 4-pounders): Armed smaller vessels, merchantmen, and less vulnerable land sectors.

LIGHTWAVE - In addition to the UV model I included the model with the original material with images maps and Lightwave procedural textures.
The Fbx file has been exported with Lightwave. When you open it with other software you may need to reassign textures.
As for the Fbx file, you may need to reassign textures when open the Obj file with different software.
BLENDER - UV model with uv material assigned
In any case the object has a unique UV map. To reassign textures you only have to load texture maps and assign each of them to the respective channel