"Even once would still be more than now." He understands semantics.

He is not, however, sure he understands what 'shootin' stupid' means. She probably doesn't mean that the entire concept of guns is stupid (although it is).

"What, as in a gun for beginners?"

Swords don't need ammo, and he rather likes precision, which is clear in the efficiency of movement as he slices into another monster.