Ok,
Here is an example of "State of the Art" in the KA-50 gun. This statement is representational in form.
The Ka-50's gun was first made out of steel, then developers of the KA-50 discovered a new stronger, lighter, heat-resistant material. The developers then used the same blue-print specks and built the same gun out of this new material, making an old version new and "state of the art"