We've raised meat rabbits for years, among other overstock.

Depending on where you live, a New Zealand/California mix is about as good as you can get for meat rabbits. They grow well and aren't overly delicate.

If you live somewhere with wild heat waves, just straight Californias, or some of the custom breeds from Texas A&M would be better to avoid heat deaths.

Also, you can just feed them grass in rabbit tractors, but they won't thrive like if they had access to a more varied diet. That's for all rabbits, not just meat rabbits