While not exactly eager to give the gun back to a guy who'd agree to this madness, Nick does take into account the fact that Firo seems willing to work with him at all. Firo is taking his offer and giving him a chance to end this as peacefully as possible, and while Nick might not fully trust him or his motivation in all this, that's a hard bargain to pass up, considering that's what he hoped to accomplish in the first place.

He pushes a sigh through him, one he doesn't actually need, given what he is. He might be a detective and have the mind of a long-dead cop, but he's dealt with his fair share of shady and amoral characters in the Commonwealth. You have to get your hands dirty if you want to want to root out the weeds. Firo might be a pest in the garden, but he's not the main threat here.

"All right. It's not as though you don't know where I live to get it back. I'd take you into custody, but anyone who's seen me in the last couple of months knows I'm not in any shape to be dragging a body down a flight of stairs."