This is the smaller of the two guns at Ft. Knox (near Bucksport, ME). The 15" is probably more dramatic, it's outside it's in the direct sun. The smaller gun is inside the brick arcade where the directional light helps reveal the textures in the metal.
Very interesting image. I love industrial photography as this, its a nice change from the nature/trees/water ect! A very fine crafted print and well seen image.