Hello Zach,
By drag I mean the little U -shaped piece added to the tip of the scabbard. It can be seen in one of your first pics
On European sabres it was originally added as further protection to the tip of the scabbard from damage when the sabre dragged on the floor, hence "drag". I attach a European example.
It looks like a later addition to me as it doesn't seem to flow with the rest of the chape (the decorative tip of the scabbard).
Emanuel