Looks like a rooster to me. Great development of the comb and wattles, along with the look of the legs---they really are to thick to be on a hen of that age.
I learned by the old fashion gamers so poultry is still new but the breast feathers are really dark compared to the other plumage that is mostly red. Yes I do agree with the comb, waddles, and thick legs but a red bird with a black breast is a rooster all the way with me. Unless he lays an egg.