There appears to be a a barring gene there but with red instead of black, so I'm going to guess legbar x RIR or production red. As much as anything, I'm going for that because I have 2x 4 week old chicks of this breeding and from the way they are feathering in, I can imagine them ending up looking very similar. I'll let you know in 20 weeks or so when they are full grown.
Howfunky' is right though, he is very handsome.
I have to disagree with everyone here... Looks like a cream legbar mix. I definitely see the cream legbar in there, but some characteristics such as white earlobes are missing. That's why I say it's a cream legbar cross.