[quote=@Zobozun]
[@Unoedipal]
He doesn't have any guns though, just training with them. [url=https://en.wikipedia.org/wiki/GAZ-24]A GAZ is a type of car.[/url]
Besides, if anyone is going to have training with firearms, I'd say it's the unhinged Russian kill-golem.
Also I was under the impression one couldn't cast magic without a crest but if not then alright.
[/quote]

Whoops, I read GAU because I'm blind sometimes. 

Crests aren't Circuits. Or rather, all Crests are Circuits but not all Circuits are Crests. Refer to this:

[quote]Magic Circuit
Magic Circuits are the pseudo-nerves that a magus has inside himself. These are paths that generate magic energy and access the magic foundation engraved in the world. Magi make magic energy with the magic circuits and use the magic energy to run the magic foundation and thus put magecraft into effect. To do either of these, the magic circuits are necessary.

Magic Crest
The product of stamping the anchored mystery that a magus had spent his entire life building up. Can be said to be mystical inheritance that defines the magus line as a magus line. While the inheritor is young, it is necessary to implant this little at a time while at the same time having the body adjust to the magic crest by medicine and rituals. The magic association also has technology for extracting just the magic crest from the body and storing it.[/quote]