Student stockpiled arsenal, threatened school shooting, police say

Wow. "Stockpiled an arsenal".
...they found ammunition, a ballistic vest, a high-powered crossbow with arrows and a container used to load clips -- all of which Sun could have purchased online.

Crossbow crime is just rampant, especially the "high-powered" ones. And what the hell is a "container used to load clips" and why was that so frightening?