There are not very many words like "carbine" that are used by a limited number of people in everyday conversation. Even rarer, we have three distinct groups of people who use this word. Oddly, depending on what group you surround yourself with determines how YOU say it. If you happen to drift into a different circle of influence, the way you hear "carbine" will sound wrong.
Pronunciations of words used to be "vernacular" or regional. In the case of a word like "carbine" it has become "argot" or group-speak because of the internet. How you say a certain word is "programmed" by your peer group. (though carbine is almost universally said the same in U.K. and other countries colonized by the British.
"Carbine" (why you pronounce it the way you do) ─ TAOFLEDERMAUS
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