I have the long version with bayonet also. When that pig-sticker is attached the rifle becomes an adequate tool with which to "un-horse" mounted attackers. Persian infantrymen had some expectation of having to do this. I don't think high-ranking decision-makers deemed artillerymen as having a similar need. The carbine does have a Mauser-like bayonet mounting system, so perhaps there exists a shorter bayonet more in keeping with the carbine's diminutive stature. From your photo the bayonet appears 3/4 the length of the carbine!
"Wars are, of course, as a rule to be avoided; but they are far better than certain kinds of peace." - T.R.