He had no money on hand to provide him, now. The bag of coins had been tossed back to one of his subordinates. He only had one thing to give him that was on hand. The top button was undone, and all in a single, fluid-like motion, a hand descended into his coat, and the pistol was withdrawn--a series of events taking no less than a fraction of a second. He didn't give Pietro a chance to respond to the action, either to beg him to put the gun away, or change his mind about the deal with sudden interest in being a guide.
Reestablish superiority.
Rather than just wave a gun around, he actually used it. A window--a poor, innocent window, deserving no more than to be looked through to see all sorts of older merchandise traded in for money. The man in the red coat simply put his arm to the side and pulled the trigger. The window shattered instantly, and the crowd outside was likely to become alarmed and well beyond alert--but entrance wasn't an option. He had men outside, and no matter the attention received by the lower caste crowd, they weren't getting through.
"Let me make this a bit clearer for you," the man in the red coat announced, his firearm now trained upon the head of the pawn shop owner, "I sail away and get a promotion for succeeding in this oh-so-important mission, and you walk away a rich man--wealthy for the rest of your days. And nobody gets hurt. Or, we kill our way through this spiral, starting with you, and reach these people eventually."
He had a bit more information about the shop than he let on--specifically, the pawn shop owner's name. Pietro. Superiority reestablished, he could make his case again, except this time time a lot more backbone in it. These people responded better to fear--and so, he'd give him some fear.
"You're a smart man, Pietro. You know how to make the right choices and make the right friends, or else you'd already be dead. Now, start acting as smart as I know you can be, and answer me: am I shooting you or am I paying you?"