LOL, no worries
. I'll re-post your first 2 pix as they were sideways and upside down...
I really don't see any Arab traits in him. He looks very Quarter Horse-y to me. I suppose it's possible that he's got some Morgan in there somewhere but I'm not terribly familiar with that breed and their traits so I'll leave that to someone who knows more about them. If he's got draft, it a couple of generations back; not enough height and too light on bone to be half.
Pretty much any breed will have a varying degree of feathers. I've known some QH that had a lot of feather on them, so much to make you doubt their breeding, and I've got a half draft that's got less feather than your guy LOL.
Whatever he is, he's one heck of a gorgeous, stout little guy.