Which of the following examples would be categorized as firearms evidence?

Firearms evidence is specifically related to the use of firearms and includes any physical item that can provide information or links to the use of a gun in a crime. Projectiles, which are the small projectiles that are fired from firearms, fall directly within this category as they can be analyzed for their characteristics and matched to particular firearms. This can provide crucial forensic evidence linking a suspect to a shooting incident.

In contrast, blood samples are typically linked to biological evidence and are used in DNA analysis, while cell phones may provide communication records or location data but do not directly pertain to firearms. Bank statements are financial documents and have no relevance to firearms evidence in the context of crime scene investigations. Thus, among the provided examples, projectiles are the only items that clearly represent firearms evidence.