Would it be plausible to give our one-armed orc a rapier or something and have him use his disability to develop a new fighting style out of necessity, which will benefit the clan? Like fencing, or some other shit, probably could use other types of weapons in some way too, orcs are good at that aye?
Orcs don't really do fencing, he seems happy enough with the one-handed curved sword he's currently got from your clan's stockpile of steel weaponry.