From their website:
Our Neo-Soviet range is our first foray into 6mm tracked vehicles. We think you’ll agree that they have a very near-future ‘Russian’ feel to them, with heavy tracks, side-skirts and above all else, big guns.
Being new, the Neo-Sovs don’t feature in either the Iron Cow or Future War Commander rulebooks. Experimental Iron Cow stats can be found in our Gaming Pages. While, you can find an unofficial FWC PDF (PDF link).