What breed?
Probably best to post good pics(full body side view and close up of head) of your bird here or on the 'what gender is this' forum.
At 6 months hackle and saddle feather should be easily identified.....if it's not already crowing or laying.
He/she has a small comb for a rooster, there is saddle feathers in one side. On the other, it's minimal. No crowing. I think he is a jersey crossed with BSL.
Thank you.