If you look at the ratings of your truck, you will know what FWs you can carry. Yes, there are some FWs, that are truly 1/2 ton towable, but you can not go by the brochures.
If you know your payload #, and the RAWR, you only need to weigh the truck, to see what hitch weight you can carry. Most FWs will have about 20% of their weight on the pin. If you use the FW GVWR, say 10,000 lbs., this would be about 2,000 lbs. pin weight, plus 150-200 lbs. more for the hitch.
Two thousand plus, is too much hitch weight, for most true 1/2 ton trucks.
Jerry