For me I really don't care about it being "realistic" it's a game based in a fantasy world where you can use magic. So taking that into account why would'nt there be magic to allow you to carry a weapon that's clearly too bloody big. Me personally I find it funny, I realy don't get peoples obssetion with wanting it to be like real life. If you want it to be real life the go to one of those conventions that allow you to roleplay as a medevil knight. the hole point of fantasy is that it's nothing like real life otherwise it wouldn't be a fantasy anymore.
When you go to sleep & dream some of the things that can happen in those dreams would never happen in the real world so why expect it from a fantasy game. It really doesn't make sence to me, people going on about multiplayer in RPG's & wanting them to be more "realistic" are the reason true RPG's & fantasy game's are on the decline. It's also part of the reason Mass Effect ended up drifting away from the RPG element of the game. All because people wanted it to be more like Call of Sh**y Duty & have multiplayer. I'm realy starting to hate what the gaming industry is comming too, there are so few game's I love anymore.