Here ya go:
This may not answer your question, but it's an interesting read. I won't argue with another person and what they call...whatever.
If you say it's a carbine, it's a carbine. Less stress, more BS
There's some fellas that I work with that will argue all day long about what's what. Potato - Potawto sortof things. Rifle - carbine - carbine - rifle. Yadda, yadda, yadda. Know whatta mean?