Is this a buff Orpington?
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I'd have to agree it's probably not a buff orpington- the legs being pink (should be yellow).
Here are 3 week old pics of confirmed buff orpingtons to compare with your chick:
Orpingtons are supposed to have pinkish legs. Your chicks are Buff Rocks. OPs chick is a Buff Orpington, and a little cockerel.
They are such nice Docile and friendly Birds..........
The hatchery they came from doesn't offer Buff Rocks.
Looking back through their chick photos, around 60 days is when the legs lost the yellow and started going pink.
Now as adults they're pinkish legs all the way.
Sorry for any confusion to the OP and others nice enough to point out the discrepancy.
Same chicks from post above, as adults:
Edited by Shezadandy - 12/13/16 at 10:45am