From Claire's starting point, head down the street, encountering several zombies. You'll eventually reach the same alleyway that Leon traversed. Follow it to Kendo's Gun Shop. Inside, you'll witness a similar cutscene, but Claire will acquire the Bowgun instead of the Shotgun. You'll also find Handgun Ammo. Be prepared for the immediate zombie threat upon exiting the shop, as the area will be swarming with undead.
