Board Thread:Questions and Answers/@comment-178.76.137.227-20150331165636/@comment-1173941-20150401002644

SAO's crafting system isn't as flexible as the real world. It's just not possible due to balancing issues, and the actual programming limitations. All weapons in-game follow pre-set templates, ranging from swords and knives, to hammers and axes, all the way to spears and halberds. Simply put, you can't craft a weapon in SAO, that the programmers didn't account for. Just like any other video game today.

It may be "Virtual Reality", but it's still wrought by limitations of the creators.