It looks a little light to be banana pied, but that is probably the lighting because the headstamp looks normal.

Popping at that size is probably going to be really hard, it's better for fairly young hatchlings. Probably want to get a probe kit to be sure or see if you can find sperm plugs in sheds. I'd imagine if its a male, he is probably at or close to sexually maturity depending how big your hands are.