I'm pretty sure the Germans considered a rifle a carbine when it had a turned down bolt and side mounted sling, like the Kar98a of WW1 vintage. They did in fact name the Karabiner98b because of the turned down bolt and side mount sling, although it was the same length at the Gew98. Those rascally Germans.[/QUOTE
It is what contemporary competent authority said what it is; don't look for logic beyond that.
BTW, the Kar 57 (needle gun) had a straight bolt and sling ring; the (Saxon) Kar 73 and the Prussian altered Chassepots (a.k.a. in some sources the "altered Chassepot" and /or "Prussian Kar 73") had bent bolts and belly swivels; the Werder Kar 69 didn't have a bolt at all and had a sling ring; the Kar 71 has a bent bolt and belly swivels.
For the purpose of your article establish your own criteria, specify it , and go from there.
I though the whole reason the germans called the MP44 a Machinepistol was to get the project past Hitler.I am not really sure if it is even worth arguing about. It is certainly shorter than a Gew98 but the same/similar length of other rifles.
Hambone's point of the differences in the G43 vs K43 is of course correct (there aren't any for those few here who do not know this)
This is kinda the same "value" of an argument as when I was "yelled" at for calling an MP44 an assault rifle and that it should not be put in a SMG comparison - by one who lived and breathed that the Germans were correct in any designation they gave a weapon. (the entire story of the "hiding" of the continued development of the Mkb42(H) over Hitler's objections was lost on him)
So I guess I am trying to make my point and then move on . . . . . . . you gonna include the MP44 series in your carbine article?
Perhaps too or in the alternative they didn't know what else to call it other than a machine pistol because there was nothing like it (intermediate rifle cartride in a select fire weapon) ever manufactured. Stg. or "sturmgewehr" or assault rifle was the term invented for that weapon. It's pretty widely stated that that weapon was called an "MP" to get around Hitler's disapproval of development of a new rifle, but then again, there was the G.41 and G.43/K.43 in production too.I though the whole reason the germans called the MP44 a Machinepistol was to get the project past Hitler.