I dont see anything screaming cockerel at this point so I'm leaning toward pullet. However, it's still very young. Keep an eye on that comb and if it reddens up over the next few weeks, you will know that we were wrong and you have a cockerel.
BantamFan4Life; I just saw that you have become the all time leader on BYC for the greatest number of lifetime posts. That's quite an achievement; especially considering that you're given out lots of good information and advice in those posts. Congratulations, and keep up the good work. You're a real credit to BYC. )
The comb is pretty red for a 5 1/2 weeker. But it doesn't really have any growth yet. So I'm gonna say pullet... For now