At that size it can certainly be both popped and probed by someone who knows what they are doing. As mentioned, spur size cannot be used in sex determination in carpet pythons.
By the way, now that I've seen some pictures of your guy from a few angles, in the interest of preventing possible mis-labeling of animals, I just wanted to share my opinion that I believe your animal is not likely a "jungle" carpet python, and sure looks to likely be an intergrade to my eyes. This isn't a bad thing by any means, but if you ever considered breeding, it wouldn't be a great idea to label offspring as "jungles".