Board Thread:Questions and Answers Forum/@comment-66.249.83.69-20140921162945/@comment-4303374-20140921213903

The point of the Vanguard armory is to help your early character on the way. If you'll notice, the Quartermaster first sells items at level 5, but progressively ascends to level 10, which is the Vanguard Armory's cap.

The VA is to help you out when you first start playing a new character and/or you don't quite know the system of weapons, yet. But after level 10, you're on your own.