He doesn't say "you ain't gonna need that," because who knows if he will? Dirk's not volatile at this very second, but he could be soon, and maybe there are freaks out there that attack strangers.

Anyway, it's good to have it with him. That's fine. Useful.

He trails out of the apartment, closing the door behind him and giving Dave a look. "Both," he says, immediately, which is both clarifying and unsettling. That said, he grips Dave's shoulder one more time, brief, then starts off down the hall, expecting Dave to follow. Either he kind of does know where he's going already, or he intends to find out. It's a toss up.