"They look like parts for a shotgun."
— Item examination - English
— Item examination - Japanese
Shotgun Parts (ショットガンパーツ shottogan-pātsu ) is an item in Resident Evil 2. These parts consist of a shotgun stock, extended barrel, and magazine extension.
Shotgun Parts can be found within in "Factory Passage 1" on the B1 level. It is hidden next to a corpse.