Let me count the ways:
- Car-bine (like: dine, refine, canine.)
- Car-bean (like: green bean, ravine, serpentine.)
- CAR-buhn (like: ..like the right and proper way to pronounce the scotch 'Oban'.)
As I understand it, the British all but universally use the first pronunciation.
The second is supported partially in the U.S. by not only countless old Western movies that 'document' our historic ways and dialects, but also the more astute fact that the word originated as the French “carabine” (pronounced: Cara-bean).
I'd love to see a graphic of North American pronunciation; as I suppose most everywhere else English speaking commonwealth people predominately inherit the Anglicized British form.