gun training

The targets picked up pace and they could turn sudden, sharp corners at the numerous
switching points, but he precisely hit every single one regardless.
Members of Anti-Skill underwent formal training and even they couldn’t do that. He
had just barely started using guns and his posture was unsteady because of his cane, but
he could already handle a gun like he’d been doing it for years.

- Toaru Majutsu no Index Volume SS1, Chapter 2 Part 1