Ichi listens, the expression on his face shows that he's straining every sense he can to take note, and memorize the sound. Even if he can't fight, he wants to know so he can at least duck for cover.

"Good to know." Ichi has had guns pointed at him on many occasions, at this point he's starting to develop a grudge against them, and so he's not about to ask to hold The Shadow's weapon.